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13x-2x-4=40
We simplify the equation to the form, which is simple to understand
13x-2x-4=40
We move all terms containing x to the left and all other terms to the right.
+13x-2x=+40+4
We simplify left and right side of the equation.
+11x=+44
We divide both sides of the equation by 11 to get x.
x=4
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