kakkakaja kakkakaja
  • 10-01-2019
  • Mathematics
contestada

what is 2x=y-10
x+7=y

Respuesta :

fizzy95jo
fizzy95jo fizzy95jo
  • 10-01-2019

Answer:

x = -3

y = 4

Step-by-step explanation:

first i plug y=x+7 for y on 2x=y-10

this makes it 2x=x+7-10

then i solve 7-10 to get 2x=x-3

i subtract -x from both sides to get x=-3

so i plug in x=-3 to x+7=y to get -3+7=y which makes y=4

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