6x+x=15+3

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



6x+x=15+3

We move all terms to the left:

6x+x-(15+3)=0

We add all the numbers together, and all the variables

6x+x-18=0

We add all the numbers together, and all the variables

7x-18=0

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

7x=18

x=18/7

x=2+4/7

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