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187.5=7-x
We move all terms to the left:
187.5-(7-x)=0
We add all the numbers together, and all the variables
-(-1x+7)+187.5=0
We get rid of parentheses
1x-7+187.5=0
We add all the numbers together, and all the variables
x+180.5=0
We move all terms containing x to the left, all other terms to the right
x=-180.5
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