3x=21-4

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Solution for 3x=21-4 equation: 



3x=21-4

We move all terms to the left:

3x-(21-4)=0

We add all the numbers together, and all the variables

3x-17=0

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

3x=17

x=17/3

x=5+2/3

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