x*4-3=21

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Solution for x*4-3=21 equation: 



x*4-3=21

We move all terms to the left:

x*4-3-(21)=0

We add all the numbers together, and all the variables

x*4-24=0

Wy multiply elements

4x-24=0

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

4x=24

x=24/4

x=6

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