4r+9=1+2r

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Solution for 4r+9=1+2r equation: 



4r+9=1+2r

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

4r-2r-1+9=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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