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4.40-(20*2)-(10*2)=x
We move all terms to the left:
4.40-(20*2)-(10*2)-(x)=0
We add all the numbers together, and all the variables
-x+4.40-40-20=0
We add all the numbers together, and all the variables
-1x-55.6=0
We move all terms containing x to the left, all other terms to the right
-x=55.6
x=55.6/-1
x=-55+0.6/1
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