SOLUTION: Jessica's grandmother and Jessica have the same birthday. Jessica's grandmother was 54 when Jessica was born. In exactly 1 year, grandmother will be 4 times Jessica's age. How old
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Question 1123681: Jessica's grandmother and Jessica have the same birthday. Jessica's grandmother was 54 when Jessica was born. In exactly 1 year, grandmother will be 4 times Jessica's age. How old is Jessica now? How old is grandmother now? Found 2 solutions by Boreal, ikleyn:Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! Jessica is x years old
Grandmother is x+54
in one year, x+1 will be Jessica, and 4(x+1)=x+55 for grandmother
4x+4=x+55
3x=51
x=17
Jessica is 17 and her Grandmother is 71
in one year, she will be 18 and her grandmother 72, four times her age.
If Jessica is now J years old, then her grandmother, who is 54 years older, is J + 54 years old.
The condition says
(J + 54) + 1 = 4*(J + 1)
Simplify and solve for J:
J + 55 = 4J + 4
55 - 4 = 4J - J
51 = 3J ====> J = 51/3 = 17.
Answer. Jessica is 17 years old. Grandmother is 17 + 54 = 71 years old.
