x+13+x+11=18

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Solution for x+13+x+11=18 equation: 



x+13+x+11=18

We move all terms to the left:

x+13+x+11-(18)=0

We add all the numbers together, and all the variables

2x+6=0

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

2x=-6

x=-6/2

x=-3

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