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-7+42x=-30+5x
We move all terms to the left:
-7+42x-(-30+5x)=0
We add all the numbers together, and all the variables
42x-(5x-30)-7=0
We get rid of parentheses
42x-5x+30-7=0
We add all the numbers together, and all the variables
37x+23=0
We move all terms containing x to the left, all other terms to the right
37x=-23
x=-23/37
x=-23/37
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