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80.25-87x=73.35-64x
We move all terms to the left:
80.25-87x-(73.35-64x)=0
We add all the numbers together, and all the variables
-87x-(-64x+73.35)+80.25=0
We get rid of parentheses
-87x+64x-73.35+80.25=0
We add all the numbers together, and all the variables
-23x+6.9=0
We move all terms containing x to the left, all other terms to the right
-23x=-6.9
x=-6.9/-23
x=3.6315789473684/12.105263157895
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