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15x-8x+17=66
We simplify the equation to the form, which is simple to understand
15x-8x+17=66
We move all terms containing x to the left and all other terms to the right.
+15x-8x=+66-17
We simplify left and right side of the equation.
+7x=+49
We divide both sides of the equation by 7 to get x.
x=7
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