4x-21+5x=19-x

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Solution for 4x-21+5x=19-x equation: 



4x-21+5x=19-x

We move all terms to the left:

4x-21+5x-(19-x)=0

We add all the numbers together, and all the variables

4x+5x-(-1x+19)-21=0

We add all the numbers together, and all the variables

9x-(-1x+19)-21=0

We get rid of parentheses

9x+1x-19-21=0

We add all the numbers together, and all the variables

10x-40=0

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

10x=40

x=40/10

x=4

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