Question

Let x represent Anna's age. If John's age is Anna's age plus 1 and Tamara is Anna's

decreased by 2, write an expression that represents the sum of Anna's and John's
age, minus Tamara's age?

Answer 1

x + 3

Explanation:

x = Anna's age

y = John's age

z = Tamara's age

y = x + 1

z = x - 2

the expression for the sum of Anna's and John's age minus Tamara's age is

x + y - z

and when we use the equations above to simplify that :

x + (x + 1) - (x - 2) = x + x + 1 - x + 2 = x + 3