19 is the answer to this question
6m
18 x 1/3 is the same as 18 / 3 = 6
I would assume the weight of the person burning 36 calories per mile would weigh 180 pounds.
X/6+4=15
subtract 4 from both sides to get rid of the addition
x/6=11
multiply by 6 from both sides to get rid of the division
x=66(simplest form)
66 (Joseph's books) +31 (Gilda's books) +31 (Mark's books)= 128 Number of books all together.
