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1.1x-0.7x=12.8
We simplify the equation to the form, which is simple to understand
1.1x-0.7x=12.8
We move all terms containing x to the left and all other terms to the right.
+1.1x-0.7x=+12.8
We simplify left and right side of the equation.
+ 0.4x=+12.8
We divide both sides of the equation by 0.4 to get x.
x=32
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