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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