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4x=7-x+3x+15
We simplify the equation to the form, which is simple to understand
4x=7-x+3x+15
We move all terms containing x to the left and all other terms to the right.
+4x+1x-3x=+7+15
We simplify left and right side of the equation.
+2x=+22
We divide both sides of the equation by 2 to get x.
x=11
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