21=19+x/4

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Solution for 21=19+x/4 equation: 



21=19+x/4

We move all terms to the left:

21-(19+x/4)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

-x/4-19+21=0

We multiply all the terms by the denominator


-x-19*4+21*4=0

We add all the numbers together, and all the variables

-1x+8=0

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

-x=-8

x=-8/-1

x=+8

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