SOLUTION: In the xy-plane, the function y=ax+12, where a is a constant, passes through point (-a,a). If a>0, what is the value of a?

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Question 1202807: In the xy-plane, the function y=ax+12, where a is a constant, passes through point (-a,a). If a>0, what is the value of a?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
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xy-plane, the function y=ax+12, where a is a constant, passes through point (-a,a).
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SUBSTITUTE!
a=a%28-a%29%2B12
a=-a%5E2%2B12
a%5E2%2Ba=12
a%28a%2B1%29=12=3%2A4-----just through factorization

highlight%28a=3%29