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15=6x+5x-7
We simplify the equation to the form, which is simple to understand
15=6x+5x-7
We move all terms containing x to the left and all other terms to the right.
-6x-5x=-7-15
We simplify left and right side of the equation.
-11x=-22
We divide both sides of the equation by -11 to get x.
x=2
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