7x+5=21+3x

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Solution for 7x+5=21+3x equation: 



7x+5=21+3x

We move all terms to the left:

7x+5-(21+3x)=0

We add all the numbers together, and all the variables

7x-(3x+21)+5=0

We get rid of parentheses

7x-3x-21+5=0

We add all the numbers together, and all the variables

4x-16=0

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

4x=16

x=16/4

x=4

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