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140+5x=130+7x
We simplify the equation to the form, which is simple to understand
140+5x=130+7x
We move all terms containing x to the left and all other terms to the right.
+5x-7x=+130-140
We simplify left and right side of the equation.
-2x=-10
We divide both sides of the equation by -2 to get x.
x=5
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