7r^+4=-9r

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Solution for 7r^+4=-9r equation: 



7r^+4=-9r

We move all terms to the left:

7r^+4-(-9r)=0

We add all the numbers together, and all the variables

7r-(-9r)+4=0

We get rid of parentheses

7r+9r+4=0

We add all the numbers together, and all the variables

16r+4=0

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

16r=-4

r=-4/16

r=-1/4

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