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-2x+7+5x=28
We simplify the equation to the form, which is simple to understand
-2x+7+5x=28
We move all terms containing x to the left and all other terms to the right.
-2x+5x=+28-7
We simplify left and right side of the equation.
+3x=+21
We divide both sides of the equation by 3 to get x.
x=7
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