rooksmichelle3 rooksmichelle3

13-02-2020
Mathematics

contestada

Solve each system of linear equations by elimination. 5x-y=7 4x+8y=-12

Respuesta :

ghanami ghanami

14-02-2020

Answer:

Step-by-step explanation:

hello :

5x-y=7....(*)

4x+8y=-12...(**)

multiply (*) by 8 : 40x-8y =56 ...(***)

add(**) and (***) : 44x = 44 so : x = 1

put this value in (*) : 5(1)-y = 7

y = 5-7 = -2

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