-2+4(1+9r)=30

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Solution for -2+4(1+9r)=30 equation: 



-2+4(1+9r)=30

We move all terms to the left:

-2+4(1+9r)-(30)=0

We add all the numbers together, and all the variables

4(9r+1)-2-30=0

We add all the numbers together, and all the variables

4(9r+1)-32=0

We multiply parentheses

36r+4-32=0

We add all the numbers together, and all the variables

36r-28=0

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

36r=28

r=28/36

r=7/9

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