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100-5x=75+2x
We move all terms to the left:
100-5x-(75+2x)=0
We add all the numbers together, and all the variables
-5x-(2x+75)+100=0
We get rid of parentheses
-5x-2x-75+100=0
We add all the numbers together, and all the variables
-7x+25=0
We move all terms containing x to the left, all other terms to the right
-7x=-25
x=-25/-7
x=3+4/7
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