Hi

Solving by substitution



x+y=10 Or y = -x + 10

y = 3x+2

-x + 10 = 3x + 2

8 = 4x

2 = x

solving for y

y = -x + 10

y = -2 + 10

y = 8

CHECKING our Answer

x+ y = 10

2 + 8 = 10 

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