X+2y=18,y=18

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Solution for X+2y=18,y=18 equation: 



X+2X=18.X=18

We move all terms to the left:

X+2X-(18.X)=0

We add all the numbers together, and all the variables

X+2X-(+18.X)=0

We add all the numbers together, and all the variables

3X-(+18.X)=0

We get rid of parentheses

3X-18.X=0

We add all the numbers together, and all the variables

-15X=0

X=0/-15

X=0

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