4(13.9r-9.9)=86.9

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Solution for 4(13.9r-9.9)=86.9 equation: 



4(13.9r-9.9)=86.9

We move all terms to the left:

4(13.9r-9.9)-(86.9)=0

We add all the numbers together, and all the variables

4(13.9r-9.9)-86.9=0

We multiply parentheses

52r-39.6-86.9=0

We add all the numbers together, and all the variables

52r-126.5=0

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

52r=126.5

r=126.5/52

r=2+9/20.8

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