x+(2x+21)=90

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Solution for x+(2x+21)=90 equation:


x+(2x+21)=90

We simplify the equation to the form, which is simple to understand 
x+(2x+21)=90

Remove unnecessary parentheses
+x+2x+21=+90

We move all terms containing x to the left and all other terms to the right. 
+1x+2x=+90-21

We simplify left and right side of the equation. 
+3x=+69

We divide both sides of the equation by 3 to get x. 
x=23

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