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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