243=18+15x

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Solution for 243=18+15x equation: 



243=18+15x

We move all terms to the left:

243-(18+15x)=0

We add all the numbers together, and all the variables

-(15x+18)+243=0

We get rid of parentheses

-15x-18+243=0

We add all the numbers together, and all the variables

-15x+225=0

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

-15x=-225

x=-225/-15

x=+15

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