90-x=0.8(x)

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Solution for 90-x=0.8(x) equation:


90-x=0.8(x)

We simplify the equation to the form, which is simple to understand 
90-x=0.8(x)

Reorder the terms in parentheses
90-x=+( + 0.8x)

Remove unnecessary parentheses
+90-x=0.8x

We move all terms containing x to the left and all other terms to the right. 
-1x-0.8x=-90

We simplify left and right side of the equation. 
-1.8x=-90

We divide both sides of the equation by -1.8 to get x. 
x=50

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