15x-21=42

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Solution for 15x-21=42 equation: 



15x-21=42

We move all terms to the left:

15x-21-(42)=0

We add all the numbers together, and all the variables

15x-63=0

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

15x=63

x=63/15

x=4+1/5

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