5X-21=3x+3

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Solution for 5X-21=3x+3 equation: 



5X-21=3X+3

We move all terms to the left:

5X-21-(3X+3)=0

We get rid of parentheses

5X-3X-3-21=0

We add all the numbers together, and all the variables

2X-24=0

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

2X=24

X=24/2

X=12

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