x+x+(x-4)=420

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Solution for x+x+(x-4)=420 equation: 



x+x+(x-4)=420

We move all terms to the left:

x+x+(x-4)-(420)=0

We add all the numbers together, and all the variables

2x+(x-4)-420=0

We get rid of parentheses

2x+x-4-420=0

We add all the numbers together, and all the variables

3x-424=0

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

3x=424

x=424/3

x=141+1/3

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