9x+21=2x=4x+6

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Solution for 9x+21=2x=4x+6 equation: 



9x+21=2x=4x+6

We move all terms to the left:

9x+21-(2x)=0

We add all the numbers together, and all the variables

7x+21=0

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

7x=-21

x=-21/7

x=-3

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