21x-7=18x+5

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Solution for 21x-7=18x+5 equation: 



21x-7=18x+5

We move all terms to the left:

21x-7-(18x+5)=0

We get rid of parentheses

21x-18x-5-7=0

We add all the numbers together, and all the variables

3x-12=0

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

3x=12

x=12/3

x=4

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