-10+4r=10+9r

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Solution for -10+4r=10+9r equation: 



-10+4r=10+9r

We move all terms to the left:

-10+4r-(10+9r)=0

We add all the numbers together, and all the variables

4r-(9r+10)-10=0

We get rid of parentheses

4r-9r-10-10=0

We add all the numbers together, and all the variables

-5r-20=0

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

-5r=20

r=20/-5

r=-4

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