sophssands02 sophssands02

08-02-2018
Mathematics

contestada

Solve by substitution
4x + 7y = 1
y = -2x-7

Respuesta :

musiclover10045 musiclover10045

08-02-2018

4x + 7y = 1

y = -2x-7

4x+7(-2x-7) = 1

4x-14x-49 = 1

-10x - 49 =1

-10x = 50

x = -5

y = -2(-5)-7

y = 10-7

y = 3

(-5,3)

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