18+x+x=5x+3

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Solution for 18+x+x=5x+3 equation: 



18+x+x=5x+3

We move all terms to the left:

18+x+x-(5x+3)=0

We add all the numbers together, and all the variables

2x-(5x+3)+18=0

We get rid of parentheses

2x-5x-3+18=0

We add all the numbers together, and all the variables

-3x+15=0

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

-3x=-15

x=-15/-3

x=+5

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