kadinmorgan kadinmorgan

13-12-2018
Mathematics

contestada

Solve using double substitution

y=x-7
y=-2x+8

Respuesta :

choixongdong choixongdong

13-12-2018

Answer:

(5, -2)

Step-by-step explanation:

x - 7 = -2x + 8

add 2x to both sides

x - 7 + 2x = -2x + 8 + 2x

3x - 7 = 8

Add 7 to both sides

3x - 7 + 7 = 8 + 7

3x = 15

3x = 15

x = 5

y = 5 - 7

y = -2

Solution (5, -2)

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