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100-x=75+2x
We move all terms to the left:
100-x-(75+2x)=0
We add all the numbers together, and all the variables
-x-(2x+75)+100=0
We add all the numbers together, and all the variables
-1x-(2x+75)+100=0
We get rid of parentheses
-1x-2x-75+100=0
We add all the numbers together, and all the variables
-3x+25=0
We move all terms containing x to the left, all other terms to the right
-3x=-25
x=-25/-3
x=8+1/3
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