Question

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

Answer 1

Grandson=granddaughter + 2
Grandson +gradaughter = 12

Make grandson x and granddaughter y

X=y + 2
X + y = 12

(Y + 2) + y = 12

2y + 2= 12
2y = 10
Y = 5
Granddaughter is 5
Grandson is 7

Answer 2

x = the granddaughter's age x + 2 = the grandson's age x + x + 2 ≥ 12 Collect like terms. 2x ≥ 12 Divide both sides by 2. x ≥ 6 years x + 2 ≥ 8 years