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40-x=5x-2
We move all terms to the left:
40-x-(5x-2)=0
We add all the numbers together, and all the variables
-1x-(5x-2)+40=0
We get rid of parentheses
-1x-5x+2+40=0
We add all the numbers together, and all the variables
-6x+42=0
We move all terms containing x to the left, all other terms to the right
-6x=-42
x=-42/-6
x=+7
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