18r-4=16r+4

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Solution for 18r-4=16r+4 equation: 



18r-4=16r+4

We move all terms to the left:

18r-4-(16r+4)=0

We get rid of parentheses

18r-16r-4-4=0

We add all the numbers together, and all the variables

2r-8=0

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

2r=8

r=8/2

r=4

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