Her profit was 126$ because she spent 24$ on her materials and then charged 5$ per 2 so you get 150$ then subtract the 24
(I think)
3x-12+5-x=2x-7
2x-7 =2x-7
Means there are infinite solutions.
Your answer is zero because you do 4*4=16*3=48*0=zero your answer
hope this helps you
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