Question
john is 3 times older than ann, 15 years from now he will be twice as old as ann will be then. how old is each one?
Answers
PsyDAG
J = 3A
J+15 = 2(A+15)
Substitute 3A for J in the second equation and solve for A. Insert that value into the first equation to solve for J. Check by putting both values into the second equation.
J+15 = 2(A+15)
Substitute 3A for J in the second equation and solve for A. Insert that value into the first equation to solve for J. Check by putting both values into the second equation.