20-x+(2*5)=21

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Solution for 20-x+(2*5)=21 equation:


20-x+(2*5)=21

We simplify the equation to the form, which is simple to understand 
20-x+(2*5)=21

Remove unnecessary parentheses
+20-x+10=+21

We move all terms containing x to the left and all other terms to the right. 
-1x=+21-20-10

We simplify left and right side of the equation. 
-1x=-9

We divide both sides of the equation by -1 to get x. 
x=9

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