3+(-21)+2x=18

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Solution for 3+(-21)+2x=18 equation:


3+(-21)+2x=18

We simplify the equation to the form, which is simple to understand 
3+(-21)+2x=18

Remove unnecessary parentheses
+3-21+2x=+18

We move all terms containing x to the left and all other terms to the right. 
+2x=+18-3+21

We simplify left and right side of the equation. 
+2x=+36

We divide both sides of the equation by 2 to get x. 
x=18

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