x+6+12x=90-3x

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Solution for x+6+12x=90-3x equation: 



x+6+12x=90-3x

We move all terms to the left:

x+6+12x-(90-3x)=0

We add all the numbers together, and all the variables

x+12x-(-3x+90)+6=0

We add all the numbers together, and all the variables

13x-(-3x+90)+6=0

We get rid of parentheses

13x+3x-90+6=0

We add all the numbers together, and all the variables

16x-84=0

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

16x=84

x=84/16

x=5+1/4

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