27=-21+7x-3x

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Solution for 27=-21+7x-3x equation:


27=-21+7x-3x

We simplify the equation to the form, which is simple to understand 
27=-21+7x-3x

We move all terms containing x to the left and all other terms to the right. 
-7x+3x=-21-27

We simplify left and right side of the equation. 
-4x=-48

We divide both sides of the equation by -4 to get x. 
x=12

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