(10x-11)=39+40

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Solution for (10x-11)=39+40 equation: 



(10x-11)=39+40

We move all terms to the left:

(10x-11)-(39+40)=0

We add all the numbers together, and all the variables

(10x-11)-79=0

We get rid of parentheses

10x-11-79=0

We add all the numbers together, and all the variables

10x-90=0

We move all terms containing x to the left, all other terms to the right

10x=90

x=90/10

x=9

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