Max bought CDs online. He paid $157.20 for 15 CDs, including the $12 shipping and handling fee. If each of the 15 CDs was the sa
2 answers:
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Step-by-step explanation:
You're asking why
let's transpose the first equation for y
-2x-6y=18
-6y=18+2x
6y=-18-2x
y=-18/6-2x/6
y=-3-⅓x as required