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-0.5x+8.91=0.7x+3.91
We move all terms to the left:
-0.5x+8.91-(0.7x+3.91)=0
We get rid of parentheses
-0.5x-0.7x-3.91+8.91=0
We add all the numbers together, and all the variables
-1.2x+5=0
We move all terms containing x to the left, all other terms to the right
-1.2x=-5
x=-5/-1.2
x=4+0.2/1.2
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