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-42+10x=45+7x
We simplify the equation to the form, which is simple to understand
-42+10x=45+7x
We move all terms containing x to the left and all other terms to the right.
+10x-7x=+45+42
We simplify left and right side of the equation.
+3x=+87
We divide both sides of the equation by 3 to get x.
x=29
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