9=-x+4x

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Solution for 9=-x+4x equation:


9=-x+4x

We simplify the equation to the form, which is simple to understand 
9=-x+4x

We move all terms containing x to the left and all other terms to the right. 
+1x-4x=-9

We simplify left and right side of the equation. 
-3x=-9

We divide both sides of the equation by -3 to get x. 
x=3

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