1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Maksim231197 [3]
3 years ago
6

There are two numbers. Twice the first number minus the second number equals 18. Twice the second number minus the first number

equals 9. Find the numbers
Mathematics
2 answers:
Vladimir79 [104]3 years ago
3 0

Let us suppose the numbers first one is x and second is y

twice the first number - second number = 2x - y =18 -------------( equation 1 )

twice the second number - first number = 2y - x = 9 ------------( equation 2)

let us substitution method for solving these two linear equations .

first equation says 2x- y =18

OR 2x - 18 = y

let us use this value of y in second equation .

second equation is 2y - x = 9

this becomes : 2 ( 2x-18 ) - x = 9

4x - 36 - x = 9

3x = 9 +36

3x = 45

x= 45/3= 15

so y= 2x- 18 = 2( 15) -18 = (30 ) -1 8 = 12

Answer : numbers are 15 and 12

Brums [2.3K]3 years ago
3 0

Let's assume

first number is x

second number is y

we are given

Twice the first number minus the second number equals 18

so, we get first equation as

2x-y=18

second equation is

Twice the second number minus the first number equals 9

2y-x=9

we can solve for y from first equation and plug that in second equation

y=2x-18

now, we can plug

2(2x-18)-x=9

4x-36-x=9

3x=45

x=15

now, we can find y

y=2*15-18

y=12

so,

first number is 15

second number is 12..........Answer

You might be interested in
What is the volume of this prism? Rectangular prism composed of unit cubes. Prism is 6 units by 9 units by 7 units. units3
adoni [48]
The answer is:  " <span>378 units</span>³ " .
________________________________________________

( 6 units)  * ( 9 units) * (7 units)  = (6 * 9 * 7) units³ =  378 units³ .
________________________________________________
4 0
3 years ago
Read 2 more answers
Im having a mental breakdown can someone please just do this for me
topjm [15]
The slopes of the original function y = |x| are m = 1 and m = -1 (m is the variable used to represent slope).

when you add a coefficient (number) in front of |x|, it will either make the slopes steeper or more flat. the larger the value of the coefficient, the steeper the slope will be (vice versa for a coefficient smaller than 1, which would make the slope more flat than the parent(original) function).

because these are absolute value functions, they will have two slopes. one slope for the end going up from left to right, and one for the end going down from left to right. this means that one slope must be positive and the other slope must be negative for each function.

with this in mind, the slopes of y = 2|x| are m = 2 and m = -2. the coefficient of 2 narrows the function by a factor of 2 (it is twice as narrow as the parent function). the same rules apply to y = 4|x| with the slopes of this function as m = -4 and m = 4 (it is 4 times narrower than the parent function).

with the fraction coefficients, the function is being widened. therefore, the slopes of y = 1/2 |x| are m = -1/2 and m = 1/2. the slopes of y = 1/5 |x| are m = -1/5 and m = 1/5.
6 0
2 years ago
Pls explain how to solve this elimination problem!!
trapecia [35]
Multiply the second equation by -2. This will cancel out the y
6 0
3 years ago
Can someone please help me I’m struggling
blagie [28]

Answer:

point form is (2,-1), equation form is x= 2, y=-1

Step-by-step explanation:

3 0
3 years ago
Suppose you are told that the number of X Station gaming consoles increased linearly for the month of December. What can the slo
I am Lyosha [343]
It could tell you that your amount sold is going up steadily per unit of time
8 0
4 years ago
Read 2 more answers
Other questions:
  • What is the masure of angle C? I am not sure what the answer is. Please help.
    6·2 answers
  • How did you actually solve for y and x
    12·2 answers
  • How in the world do I do this can somebody help please.
    7·1 answer
  • Assume that the wooden triangle shown is a right triangle.
    10·2 answers
  • Fabiana hikes at a rate of 3 miles per hour. How far can she hike in 4 hours
    15·2 answers
  • Simplify 2^9/2^6<br><br> A. 2^15<br><br> B. 4^3<br><br> C. 4^-3<br><br> D. 2^3
    9·2 answers
  • WILL MARK BRAINLIEST, JUST HELP ME PLS
    9·1 answer
  • The following data set represents the number of siblings 6students have in much class
    14·2 answers
  • 70.63 + 4.7 (show ur work take a pic)
    14·2 answers
  • Calvin’s credit card computes finance charges using the daily balance method. his card has a billing cycle of 30 days and an apr
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!