-3 = x ⇒ x = -3
put to equation y = 9 - 5x
y = 9 - 5(-3) = 9 + 15 = 24
Answer: x = -3 and y = 24
When substituting x = − 3 into the equation y = 9 − 5 x , we find that y = 24 . This shows that the equation correctly computes the y-value based on the given x-value. Hence, for x = − 3 the solution is y = 24 .
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