9x+21=7x+11

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Solution for 9x+21=7x+11 equation: 



9x+21=7x+11

We move all terms to the left:

9x+21-(7x+11)=0

We get rid of parentheses

9x-7x-11+21=0

We add all the numbers together, and all the variables

2x+10=0

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

2x=-10

x=-10/2

x=-5

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