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-0.2x-4=40-x
We move all terms to the left:
-0.2x-4-(40-x)=0
We add all the numbers together, and all the variables
-0.2x-(-1x+40)-4=0
We get rid of parentheses
-0.2x+1x-40-4=0
We add all the numbers together, and all the variables
0.8x-44=0
We move all terms containing x to the left, all other terms to the right
0.8x=44
x=44/0.8
x=55
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