Four ninths of a number c increased by 4 is 18 less than one eighth times another number d. solve for c. a. c=9/32 d 31 1/2 b. c=4/72 d 4/72 c. c=9/32 d - 49 1/2 d. c=4/72 d - 31 1/2 i would like to see how the answer was reached, not just the answer.