The area of a rectangle is 60 in² and the length of the rectangle is 7 in. longer than the width. the area of a rectangle is found by multiplying the length times the width. during the set up step of the five-step problem-solving plan, which equation would you set up to solve for the width

a. w + 7 = 60

b. w + 7w = 60

c. 7w = 60

d. w(w+7)=60