20x-(9x-3)=80

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Solution for 20x-(9x-3)=80 equation: 



20x-(9x-3)=80

We move all terms to the left:

20x-(9x-3)-(80)=0

We get rid of parentheses

20x-9x+3-80=0

We add all the numbers together, and all the variables

11x-77=0

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

11x=77

x=77/11

x=7

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