20x+18=15x+21

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Solution for 20x+18=15x+21 equation: 



20x+18=15x+21

We move all terms to the left:

20x+18-(15x+21)=0

We get rid of parentheses

20x-15x-21+18=0

We add all the numbers together, and all the variables

5x-3=0

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

5x=3

x=3/5

x=3/5

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