SOLUTION: if Don is 21 years older than betty, and in 6 years he will twice as old as betty how old is each person

SOLUTION: if Don is 21 years older than betty, and in 6 years he will twice as old as betty how old is each person

Algebra.Com

Question 614885: if Don is 21 years older than betty, and in 6 years he will twice as old as betty how old is each person
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
d = b + 21

d + 6 = 2(b + 6)

substituting ___ (b + 21) + 6 = 2(b + 6) ___ b + 27 = 2b + 12

solve for b, then substitute back to find d
RELATED QUESTIONS
Don is 21 years older than Betty. In 6 years Don will be twice as old as Betty. How old... (answered by robertb)

Archie is 6 years older than Betty. In two years, Archie will be twice as old as Betty. (answered by math_tutor2020,ewatrrr,greenestamps,josgarithmetic)

Sipho is 6 years older than Betty. In 3 years time Sipho will be twice as old as Betty.... (answered by ikleyn,ewatrrr)

Ann, Betty, and Charlotte are sisters, Ann is twice as old as Betty, and Betty is !2... (answered by ptaylor)

Jack is 6 years older than betty in 3 years time jack will be twice as old as betty.how... (answered by Cromlix)

Betty is 5 years older than twice the age of Bambam. Fred is 3 years older than Betty.... (answered by Maths68)

Jason is 21 years older than his sister Sarah. In 5 years he will be twice as old as... (answered by Maths68)

tony is 21 years older than his sister. in 10 years he will be twice as old as his... (answered by stanbon)

Ray is 21 years older than his sister Mary. In 7 years, he will be twice as old as Mary.... (answered by Alan3354)