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-x + 3 + 2x = 10
We simplify the equation to the form, which is simple to understand
-x+3+2x=10
We move all terms containing x to the left and all other terms to the right.
-1x+2x=+10-3
We simplify left and right side of the equation.
+1x=+7
We divide both sides of the equation by 1 to get x.
x=7
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