8x-3-2x=2*3+21

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Solution for 8x-3-2x=2*3+21 equation: 



8x-3-2x=2*3+21

We move all terms to the left:

8x-3-2x-(2*3+21)=0

We add all the numbers together, and all the variables

8x-2x-3-27=0

We add all the numbers together, and all the variables

6x-30=0

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

6x=30

x=30/6

x=5

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