Asked by Sarah

this december your brother jack will be 2 years from being twice as old as your sister Jen. the sum of jacks age and three times jens age is 68. how old is jen?

Answers

Answered by TutorCat
Jack's age=2*(Jen's age)-2
[Jack's age]+3*(Jen's age)=68

use substitution method:
[2*(Jen's age)-2]+3*(Jen's age)=68
Solve for Jen's age.




Answered by elizabeth
how to solve a matrice when it's like b21 and it givec you to sets of matrices like AND IT SAYS TO ID EACH ELEMENT
A.)O -1 B.)6 -3 1/2
1.5 3 AND
7 -2
Answered by Henry
Jen's age = X yrs.
Jack's age = (2X -2) YRS.

(2X - 2) + 3X = 68,
2X + 3X -2 = 68,
5X = 68 + 2 = 70,
X = 14 yrs. = Jen's age.

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