8+4-x=9

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Solution for 8+4-x=9 equation:


8+4-x=9

We simplify the equation to the form, which is simple to understand 
8+4-x=9

We move all terms containing x to the left and all other terms to the right. 
-1x=+9-8-4

We simplify left and right side of the equation. 
-1x=-3

We divide both sides of the equation by -1 to get x. 
x=3

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