1=5(r+9)-2(1+r)

Solution for 1=5(r+9)-2(1+r) equation:

1=5(r+9)-2(1+r)

We move all terms to the left:

1-(5(r+9)-2(1+r))=0

We add all the numbers together, and all the variables

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


We calculate terms in parentheses: -(5(r+9)-2(r+1)), so:

5(r+9)-2(r+1)

We multiply parentheses

5r-2r+45-2

We add all the numbers together, and all the variables

3r+43

Back to the equation:

-(3r+43)


We get rid of parentheses

-3r-43+1=0

We add all the numbers together, and all the variables

-3r-42=0

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

-3r=42

r=42/-3

r=-14