-4x+21=8x+12(1-x)

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Solution for -4x+21=8x+12(1-x) equation:


-4x+21=8x+12(1-x)

We simplify the equation to the form, which is simple to understand 
-4x+21=8x+12(1-x)

Reorder the terms in parentheses
-4x+21=8x+(+12-12x)

Remove unnecessary parentheses
-4x+21=+8x+12-12x

We move all terms containing x to the left and all other terms to the right. 
-4x-8x+12x=+12-21

We simplify left and right side of the equation. 
0x=-9

0=-9

The left and right sides are not equal, therefore there is no solution. This equation is invalid.

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