rooksmichelle3
rooksmichelle3 rooksmichelle3
  • 13-02-2020
  • Mathematics
contestada

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

Respuesta :

ghanami
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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