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(3.5x-8)+x+x+1.5x=90
We simplify the equation to the form, which is simple to understand
(3.5x-8)+x+x+1.5x=90
Remove unnecessary parentheses
3.5x-8+x+x+1.5x=90
We move all terms containing x to the left and all other terms to the right.
+3.5x+1x+1x+1.5x=+90+8
We simplify left and right side of the equation.
+7x=+98
We divide both sides of the equation by 7 to get x.
x=14
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