Question

How do I answer this problem

Answer 1

5(r+9)-2(1-r)=1
Expand 5r+45-2+2r=1
Simplify 5r+45-2+2r to 7r+43
7r+43=1
Subtract 43 from both sides
7r=1-43
7r=-42
Divide both sides by 7
r=-42/7 to -6
r=-6

Answer 2

5(r+9)-2(1-r)=1
5r+45-2+r=1
6r+43=1
6r=-42
r=-7