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126=.7(200-x)
We simplify the equation to the form, which is simple to understand
126=.7(200-x)
Reorder the terms in parentheses
126=+(+140-0.7x)
Remove unnecessary parentheses
+126=+140-0.7x
We move all terms containing x to the left and all other terms to the right.
+ 0.7x=+140-126
We simplify left and right side of the equation.
+ 0.7x=+14
We divide both sides of the equation by 00.7 to get x.
x=20
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