6x+3+3x=138

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Solution for 6x+3+3x=138 equation: 



6x+3+3x=138

We move all terms to the left:

6x+3+3x-(138)=0

We add all the numbers together, and all the variables

9x-135=0

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

9x=135

x=135/9

x=15

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