(12x-30)+(3x)=90

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Solution for (12x-30)+(3x)=90 equation: 



(12x-30)+(3x)=90

We move all terms to the left:

(12x-30)+(3x)-(90)=0

We add all the numbers together, and all the variables

3x+(12x-30)-90=0

We get rid of parentheses

3x+12x-30-90=0

We add all the numbers together, and all the variables

15x-120=0

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

15x=120

x=120/15

x=8

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