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-2x+5x+10+30=2x+90
We move all terms to the left:
-2x+5x+10+30-(2x+90)=0
We add all the numbers together, and all the variables
3x-(2x+90)+40=0
We get rid of parentheses
3x-2x-90+40=0
We add all the numbers together, and all the variables
x-50=0
We move all terms containing x to the left, all other terms to the right
x=50
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