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-7+5(2x-15)=-42
We move all terms to the left:
-7+5(2x-15)-(-42)=0
We add all the numbers together, and all the variables
5(2x-15)+35=0
We multiply parentheses
10x-75+35=0
We add all the numbers together, and all the variables
10x-40=0
We move all terms containing x to the left, all other terms to the right
10x=40
x=40/10
x=4
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