Dustin is 6 years older than Sierra. In 5 years the sum of their ages will be 78. How old is Dustin now?

Science & Mathematics by Anonymous 2018-07-08 06:04:09

Social Science

4 answers

Anonymous

Here is the set up. Dustin's age now: x + 6 Sierra's age now: x Dustin's age in 5 years: (x + 6) + 5 Sierra's age in 5 years: x + 5 (x + 6) + 5 + x + 5 = 78 You finish....
Anonymous

Dustin Hoffman is very old.
Anonymous

Dustin__________Sierra x + 6_____________x x + 11___________x + 5 x + 11 + x + 5 = 78 2x = 62 x = 31 Dustin is 37
Anonymous

D = S + 6 D + 5 + S + 5 = 78 Solve the system of equations. S + 6 + 5 + S + 5 = 78 2S + 16 = 78 2S = 62 S = 31 D = 37