-4=r-9/2

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Solution for -4=r-9/2 equation: 



-4=r-9/2

We move all terms to the left:

-4-(r-9/2)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

-r-4+9/2=0

We multiply all the terms by the denominator


-r*2+9-4*2=0

We add all the numbers together, and all the variables

-r*2+1=0

Wy multiply elements

-2r+1=0

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

-2r=-1

r=-1/-2

r=1/2

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