Solving Multi-Step Inequalities:

A grandmother says her grandson is two years older than her granddaughter and that together, they are at least 12 years old. How old are her grandson and granddaughter?

Because the problem says - they are AT LEAST ...

You would need to list the answers this way

GrandD is < or = to 5 GrandS is greater or = to 7

Step-by-step explanation:

These are so fun!

Let GrandD = X

Let GrandS = X + 2 (because he is two years older than GrandD)

Their age together is 12 years - so ...

GrandD + GrandS = 12 OR ...

x + x + 2 = 12

Now solve for x.

2x + 2 = 12

2x = 10 (because we subtract the ones on the left from the ones on the right)

x = 5 (because we divide both sides by 2)

This means that GrandD (x) is equal or greater than 5 years old

And GrandS (x + 2) = or greater than 7 years old