9x+21+3x=7

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Solution for 9x+21+3x=7 equation: 



9x+21+3x=7

We move all terms to the left:

9x+21+3x-(7)=0

We add all the numbers together, and all the variables

12x+14=0

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

12x=-14

x=-14/12

x=-1+1/6

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