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13x+2x=15
We simplify the equation to the form, which is simple to understand
13x+2x=15
We move all terms containing x to the left and all other terms to the right.
+13x+2x=+15
We simplify left and right side of the equation.
+15x=+15
We divide both sides of the equation by 15 to get x.
x=1
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