Question

sally is x years old and her sister ann is 4years younger. If the product of their ages is 140, form an equation in x and solve it to find ann's age

Answer 1

y beeing her sister age
x being her age

y=x-4
140=x+y

140=x+x-4
140=2x-4
144=2x
72=x

She is 72 and her sister is 68