21+2x=45-4x

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Solution for 21+2x=45-4x equation: 



21+2x=45-4x

We move all terms to the left:

21+2x-(45-4x)=0

We add all the numbers together, and all the variables

2x-(-4x+45)+21=0

We get rid of parentheses

2x+4x-45+21=0

We add all the numbers together, and all the variables

6x-24=0

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

6x=24

x=24/6

x=4

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