Math word problem
posted by kimi .
The length&breadth of a rectangle are (x+5)cm&3cm respectively.Find the length if the area of the rectangle is 42 cm2.

length = x+5 cm
breadth = 3 cm
area = length x breadth
42 cm^2 = 3 cm(x+5 cm)
42 cm^2 = 3x cm + 15 cm^2
now solve for x