Question

If x = 4 in this equation, what does y equal? 5x + 8y = 4
A. y = 2
B. y = 4
C. y = -2
D. y = -4

Answer 1

first, put 4 as x in 5x

Answer 2

got it?

Answer 3

5(4) + 8y = 4
20 + 8y = 4
-20 -20
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8y = -16
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8 8

therefore, y = -2