15x+6x=42

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Solution for 15x+6x=42 equation: 



15x+6x=42

We move all terms to the left:

15x+6x-(42)=0

We add all the numbers together, and all the variables

21x-42=0

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

21x=42

x=42/21

x=2

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