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2.5x+8=6.5x-4
We move all terms to the left:
2.5x+8-(6.5x-4)=0
We get rid of parentheses
2.5x-6.5x+4+8=0
We add all the numbers together, and all the variables
-4x+12=0
We move all terms containing x to the left, all other terms to the right
-4x=-12
x=-12/-4
x=+3
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