21x-5=18x+4

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Solution for 21x-5=18x+4 equation: 



21x-5=18x+4

We move all terms to the left:

21x-5-(18x+4)=0

We get rid of parentheses

21x-18x-4-5=0

We add all the numbers together, and all the variables

3x-9=0

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

3x=9

x=9/3

x=3

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