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
saul85 [17]
3 years ago
11

I need help solving a system of linear equation, and it says to solve it by Substitution.

Mathematics
2 answers:
Nata [24]3 years ago
7 0
First solve for x in the second equation (x=-6y+18).then substitute -6y+18 in the first equation and solve for y.after solving for y then substitute it in one of the equation and then solve for x.
2x-3y=-25
x+6y=18

x=-6y+18
2(-6y+18)-3y=-24
-12y+36-3y=-24
-15y+36=-24
-15y=-24-36
-15y=-60
y=4

x+6(4)=18
x+24=18
x=18-24
x=-6

y=4,x=-6
olga_2 [115]3 years ago
6 0
2x - 3y = -24
x+ 6y = 18

you solve the first one by the x:

2x = -24 + 3y

x = (-24+3y)/2

then you substitute what you found in the other equation and you solve by y

(-24+3y)/2 + 6y = 18                   multiply everything by 2

-24 + 3y + 12y = 36

3y + 12y = 36 + 24

15y = 60

y = 60/15

y = 4

Good job! You found your y! :D

Now let's substitute the y in the first equation with 4:

2x - 3(4) = -24

2x - 12 = -24

2x = -24 + 12

2x = -12

x = -12/2

x= -6

Done!! ;) <span />
You might be interested in
Item 19 A plant has an initial height of 1 inch and grows at a constant rate of 3 inches each month. A second plant that also gr
Alex777 [14]
3 months, i just answered this same question lol.
3 0
3 years ago
(whoever answers correctly gets brainly)
N76 [4]

Answer:

1. yes

2. NO

3.NO

4.NO

Step-by-step explanation:

3 0
3 years ago
Every Wednesday, Wayne works out for 3/4 of an hour at the fitness center. Every Saturday, he goes to the fitness center again a
matrenka [14]
3/4 of an hour = 45 minutes
45 * 3 = 135 minutes
135 + 45 = 180 minutes
He spends 180 minutes or 3 hours
4 0
3 years ago
Read 2 more answers
What should be multiplied with -25/36 to get -5/9​
Ierofanga [76]

Answer:

\frac{4}{5}

Step-by-step explanation:

\frac{-\frac{5}{9}}{-\frac{25}{36}}=\\\\-\frac{5}{9}*(-\frac{36}{25})=\\\\\frac{4}{5}

6 0
2 years ago
What is an expression that is equivalent to 10c
slega [8]
Expressions equivalent can be:
-2(5c)
-2*-5c
=10c
3 0
3 years ago
Other questions:
  • Solve.<br><br><br><br> –355 + 355 =<br><br><br><br> 0<br><br> 355<br><br> 710<br><br> –710
    6·1 answer
  • Joe needs to buy supplies for a birthday party. At the store, balloons cost $0.50 each and party hats each cost $1.25. If Joe wa
    6·2 answers
  • Which inequality is true? A. |-15| &gt; |-19| B. |-16| &lt; |13| C. |-15| &gt; |12| D. |12| &lt; |-8| E. |-19| &gt; |-20|
    9·2 answers
  • 5 hundreds + 4 tens= ____ tens
    10·1 answer
  • Solve this equation for y. <br> 3x - 5y = 12
    12·1 answer
  • If the simple interest on ​$2,000 for 8 years is ​$​800, then what is the interest​ rate?
    7·1 answer
  • DOES ANYONE KNOW THIS? PLEASE HELP
    12·1 answer
  • Which one shows a proportional relationship between x and y<br> Y=9x or y=10x
    13·1 answer
  • The highest mountain in earth is 29,028 ft. The lowest under sea trench is -35,840ft. Which has the highest absolute value
    7·2 answers
  • Solve for the value of n.
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!