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40x=78+2x
We move all terms to the left:
40x-(78+2x)=0
We add all the numbers together, and all the variables
40x-(2x+78)=0
We get rid of parentheses
40x-2x-78=0
We add all the numbers together, and all the variables
38x-78=0
We move all terms containing x to the left, all other terms to the right
38x=78
x=78/38
x=2+1/19
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