5-2x=21-4x

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Solution for 5-2x=21-4x equation: 



5-2x=21-4x

We move all terms to the left:

5-2x-(21-4x)=0

We add all the numbers together, and all the variables

-2x-(-4x+21)+5=0

We get rid of parentheses

-2x+4x-21+5=0

We add all the numbers together, and all the variables

2x-16=0

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

2x=16

x=16/2

x=8

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