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
Illusion [34]
3 years ago
7

Solve the system of equations by substitution 3x+y=9z

Mathematics
1 answer:
poizon [28]3 years ago
3 0

Answer:

x = 1.27

y = 5.18

Step-by-step explanation:

to solve this system of  equation by simultaneous equation we say that let

3x+y=9.............................. equation 1

-5x+2y=4 .......................... equation 2

from equation 1

3x+y=9.............................. equation 1

y = 9 -3x.............................. equation 3

substitute the value of y = 9 -3x into equation 2

-5x+2y=4 .......................... equation 2

-5x + 2( 9 -3x) = 4

-5x + 18 - 6x = 4

collect the like terms

18 - 4 = 6x + 5x

14 = 11x

divide both side by 11

14/11 = 11x/11

x = 14/11

x = 1.27

put the value of x = 1.27 into  equation 3

y = 9 -3x.............................. equation 3

y = 9 - 3( 1.27)

y = 9 - 3.82

y = 5.18

<em>to check if you are correct put the value of x and y into either equation 1 or equation 2.</em>

<em>3x+y=9.............................. equation 1</em>

<em>3( 1.27) + 5.18 = 9</em>

<em>3.81 + 5.18 = 9</em>

<em>9 = 9</em>

You might be interested in
Write nine hundred one and seventy-five thousands in expanded form
34kurt
900000+1000+70000+5000
6 0
3 years ago
A flight across the US takes longer east to west then it does west to east. This is due to the plane having a headwind flying we
Ipatiy [6.2K]
Sin hacon se no se mon anynayo si bor ni ka thu
3 0
3 years ago
Given 4x+6/2=9 prove x=3
Montano1993 [528]

Steps:

Step 1: Simplify both sides of the equation.

4x+3=9

Step 2: Subtract 3 from both sides.

4x+3−3=9−3

4x=6

Step 3: Divide both sides by 4.

4x /4  =  6 /4

Answer: x= 3/2

Please mark brainliest

<em><u>Hope this helps.</u></em>

8 0
3 years ago
Read 2 more answers
PLS HELP ME ASAP!!!!
elena55 [62]

Answer:

2Pi/8

Step-by-step explanation:

6 0
3 years ago
Take away 6 from 5 times g ~ in albebraic expression.
Brrunno [24]

5g-6 when you multiply a verable with a number you simplily put the letter beside the number and that lets us know to multiply:)
4 0
3 years ago
Other questions:
  • Write two possible solutions to the way inequality x&lt; 9-5
    7·1 answer
  • I will crown brainliest ..... i hate get more math so muchhh
    11·1 answer
  • Find the area to the right of a z score of 2.75 under a standard normal distribution curve
    11·1 answer
  • What is ​ 0.83¯¯¯¯ ​ expressed as a fraction in simplest form?
    6·1 answer
  • The digits of a two-digit number differ by 3. If the digits are interchanged, and the resulting number is added to the original
    6·2 answers
  • Can someone simplify this? (Picture attached)
    15·1 answer
  • If the velocity of a car traveling in a straight line at time v(t) then the difference in its odometer readings between time t=a
    10·1 answer
  • WHAT IS THE EQUATION OF THE LINES IN SLOPE -INTERCEPT FORM ?
    11·2 answers
  • Which table represents a linear function?
    6·2 answers
  • Cost of a Lunch in a School's Cafeteria
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!