3x-21+9=2x-5

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Solution for 3x-21+9=2x-5 equation: 



3x-21+9=2x-5

We move all terms to the left:

3x-21+9-(2x-5)=0

We add all the numbers together, and all the variables

3x-(2x-5)-12=0

We get rid of parentheses

3x-2x+5-12=0

We add all the numbers together, and all the variables

x-7=0

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

x=7

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