Question 376516
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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