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-9+3x=-x+7
We simplify the equation to the form, which is simple to understand
-9+3x=-x+7
We move all terms containing x to the left and all other terms to the right.
+3x+1x=+7+9
We simplify left and right side of the equation.
+4x=+16
We divide both sides of the equation by 4 to get x.
x=4
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