3x-2x=21-18

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Solution for 3x-2x=21-18 equation: 



3x-2x=21-18

We move all terms to the left:

3x-2x-(21-18)=0

We add all the numbers together, and all the variables

3x-2x-3=0

We add all the numbers together, and all the variables

x-3=0

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

x=3

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