21-4+15=4x

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Solution for 21-4+15=4x equation: 



21-4+15=4x

We move all terms to the left:

21-4+15-(4x)=0

We add all the numbers together, and all the variables

-4x+32=0

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

-4x=-32

x=-32/-4

x=+8

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