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0.75+(90-x)=0
We add all the numbers together, and all the variables
(-1x+90)+0.75=0
We get rid of parentheses
-1x+90+0.75=0
We add all the numbers together, and all the variables
-1x+90.75=0
We move all terms containing x to the left, all other terms to the right
-x=-90.75
x=-90.75/-1
x=90+0.75/1
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