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15=4x-8-x
We simplify the equation to the form, which is simple to understand
15=4x-8-x
We move all terms containing x to the left and all other terms to the right.
-4x+1x=-8-15
We simplify left and right side of the equation.
-3x=-23
We divide both sides of the equation by -3 to get x.
x=7.6666666666667
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