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8+5x-4x=7
We simplify the equation to the form, which is simple to understand
8+5x-4x=7
We move all terms containing x to the left and all other terms to the right.
+5x-4x=+7-8
We simplify left and right side of the equation.
+1x=-1
We divide both sides of the equation by 1 to get x.
x=-1
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