x+6x=21+15-3x

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Solution for x+6x=21+15-3x equation:



x+6x=21+15-3x
We move all terms to the left:
x+6x-(21+15-3x)=0
We add all the numbers together, and all the variables
x+6x-(-3x+36)=0
We add all the numbers together, and all the variables
7x-(-3x+36)=0
We get rid of parentheses
7x+3x-36=0
We add all the numbers together, and all the variables
10x-36=0
We move all terms containing x to the left, all other terms to the right
10x=36
x=36/10
x=3+3/5

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