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5x-30=-2x-75
We move all terms to the left:
5x-30-(-2x-75)=0
We get rid of parentheses
5x+2x+75-30=0
We add all the numbers together, and all the variables
7x+45=0
We move all terms containing x to the left, all other terms to the right
7x=-45
x=-45/7
x=-6+3/7
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