6x+77=9x-13

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Solution for 6x+77=9x-13 equation: 



6x+77=9x-13

We move all terms to the left:

6x+77-(9x-13)=0

We get rid of parentheses

6x-9x+13+77=0

We add all the numbers together, and all the variables

-3x+90=0

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

-3x=-90

x=-90/-3

x=+30

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