7x-15=1x+21

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Solution for 7x-15=1x+21 equation: 



7x-15=1x+21

We move all terms to the left:

7x-15-(1x+21)=0

We add all the numbers together, and all the variables

7x-(x+21)-15=0

We get rid of parentheses

7x-x-21-15=0

We add all the numbers together, and all the variables

6x-36=0

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

6x=36

x=36/6

x=6

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