21=4x+5=37

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Solution for 21=4x+5=37 equation: 



21=4x+5=37

We move all terms to the left:

21-(4x+5)=0

We get rid of parentheses

-4x-5+21=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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