Answer:
60
Step-by-step explanation:
45 divided by 9 is 5. So you multiply 4 times 5. Which equals 20. So 20 plus 45 is 65. Hope you understand it.
R+r+2r-r+4r
R + r + 2R + 4r = R+7r
R+7r - -r =
R+6r
