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15 x - x-3 -4 = 40
We simplify the equation to the form, which is simple to understand
15x-x-3-4=40
We move all terms containing x to the left and all other terms to the right.
+15x-1x=+40+3+4
We simplify left and right side of the equation.
+14x=+47
We divide both sides of the equation by 14 to get x.
x=3.3571428571429
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