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100=45-0.75x
We move all terms to the left:
100-(45-0.75x)=0
We add all the numbers together, and all the variables
-(-0.75x+45)+100=0
We get rid of parentheses
0.75x-45+100=0
We add all the numbers together, and all the variables
0.75x+55=0
We move all terms containing x to the left, all other terms to the right
0.75x=-55
x=-55/0.75
x=-73+0.25/0.75
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