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5(2x-30)=42
We move all terms to the left:
5(2x-30)-(42)=0
We multiply parentheses
10x-150-42=0
We add all the numbers together, and all the variables
10x-192=0
We move all terms containing x to the left, all other terms to the right
10x=192
x=192/10
x=19+1/5
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