ariqueen17
contestada

Debbieis one year older than dave. James is twice as old as dave. Joelle is twice as old as debbie. Altogether their ages total 33. Find each persons age. (let x = daves age)

Respuesta :

texaschic101
x = dave's age
d = debbie's age
j = joelle's age

x + d + j = 33
d = x + 1
j = 2d.......j = 2(x + 1)

x + (x + 1) + 2(x + 1) = 33
x + x + 1 + 2x + 2 = 33
4x + 3 = 33
4x = 33 - 3
4x = 30
x = 30/4
x = 7.5 <=== dave is 7.5 (or 7 1/2) years old

d = x + 1
d = 7.5 + 1
d = 8.5 <=== debbie is 8.5 (or 8 1/2) years old

j = 2(x + 1)
j = 2(7.5 + 1)
j = 2(8.5)
j = 17 <=== joelle is 17 years old

Brc3182
Dave is 5, Debbie is 6, Joelle is 12, and James is 10
Ver imagen Brc3182