# MATH

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Solve for y in the following system of equations:

x - y = -1
3x + 5y = 21

• MATH -

to Eliminate x
x - y = -1
3x + 5y = 21

multiply (x - y = -1) by -3
-3x + 3y = 3
3x + 5y = 21
0 + 8y = 24
8y = 24
y = 3

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