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20-03-2021
Mathematics

contestada

what is the solution to the system of equations x-y=5 and 3x+7y=-5

Respuesta :

20-03-2021

Answer:

Step-by-step explanation:

3(x-y)-3x-7y=3(5)-(-5)

3x-3y-3x-7y=15+5

-10y=20

y=-2, since x-y=5

x-(-2)=5

x+2=5

x=3

So the solution is the point (3,-2)

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