x+6x+21+15+3=x

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



x+6x+21+15+3=x

We move all terms to the left:

x+6x+21+15+3-(x)=0

We add all the numbers together, and all the variables

6x+39=0

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

6x=-39

x=-39/6

x=-6+1/2

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