Question

Huilan is 9 years older than Thomas. The sum of their ages is 89. What is Thomas's age??

Answer 1

is it 80

Answer 2

@SolomonZelman

Answer 3

You can define the age of Thomas by T.

Answer 4

Since Huilan is 9 years older than Thomas, you can represent his age by T + 9 to only have one variable in your equation.

Answer 5

its 40 i got it

Answer 6

Now, the sum of them two are 89, so we know both of their ages combined is equivalent to 89.

Answer 7

thanks

Answer 8

x = Thomas's age
x+9 = Huilan's age
Thomas + Huilan's age = 89 so
x+x+9=89
2x+9=89
2x=80
x=40 Thomas's age
X+9 or 49 is Hulians age

Answer 9

(T+9) + T = 89
2T + 9 = 89
2T = 89 - 9
T = 80/2
T = 40