(3+x)*2=40

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Solution for (3+x)*2=40 equation: 



(3+x)*2=40

We move all terms to the left:

(3+x)*2-(40)=0

We add all the numbers together, and all the variables

(x+3)*2-40=0

We multiply parentheses

2x+6-40=0

We add all the numbers together, and all the variables

2x-34=0

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

2x=34

x=34/2

x=17

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