x+(x-4)+(x-7)=40

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Solution for x+(x-4)+(x-7)=40 equation: 



x+(x-4)+(x-7)=40

We move all terms to the left:

x+(x-4)+(x-7)-(40)=0

We get rid of parentheses

x+x+x-4-7-40=0

We add all the numbers together, and all the variables

3x-51=0

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

3x=51

x=51/3

x=17

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