4x+3=21-5x

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Solution for 4x+3=21-5x equation: 



4x+3=21-5x

We move all terms to the left:

4x+3-(21-5x)=0

We add all the numbers together, and all the variables

4x-(-5x+21)+3=0

We get rid of parentheses

4x+5x-21+3=0

We add all the numbers together, and all the variables

9x-18=0

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

9x=18

x=18/9

x=2

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