vibes2018 vibes2018
  • 04-06-2019
  • Mathematics
contestada

Solve the system of equations using substitution. Show your work.

3x + 2y = 7

y = x - 4

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yungcee247 yungcee247
  • 04-06-2019

Answer:

x = 3

y = -1

Step-by-step explanation:

Finding X

Substitute y into the 1st equation

3x + 2(x-8) = 7

Simplify

3x + 2x-8 = 7

Combine like terms

5x - 8 = 7

Move the constant (-8) to the right

5x = 7+ 8

Simplify

5x = 15

Divide both sides by 5

x = 3

Finding Y

Now since you know x is 3 substitute that into the 2nd equation

y = 3 - 4

y = -1

Answer Link
sarakhalil31804
sarakhalil31804 sarakhalil31804
  • 04-06-2019
X=3
Y=-1 ...................
Answer Link

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