2x+4x=42*3=126,6x=126,x=21

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Solution for 2x+4x=42*3=126,6x=126,x=21 equation: 



2x+4x=42*3=126.6x=126.x=21

We move all terms to the left:

2x+4x-(42*3)=0

We add all the numbers together, and all the variables

2x+4x-126=0

We add all the numbers together, and all the variables

6x-126=0

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

6x=126

x=126/6

x=21

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