Question

Mary is four years older than Sue. If the sum of their ages is 16, how old are Mary and Sue?

Answer 1

Answer: Mary 10 Sue 6

Explanation:

Answer 2

Sue is 6 and Mary is 10

Explanation:

let Sue's age be x then Mary is x + 4 and the sum of their ages is

x + x + 4 = 16

2x + 4 = 16 ( subtract 4 from both sides )

2x = 12 ( divide both sides by 2 )

x = 6

x + 4 = 6 + 4 = 10

then Mary is 10 and Sue is 6