L - 1 = 3(J - 1)
L + 2 = 2(J +2) = 2J + 4
L = 2J + 2
Substitute 2J + 2 for L in the first equation and solve for J. Insert that value into the last equation to solve for L. Check by putting both values into the first equation.
One year ago Liz was 3 times as old as her brother Jack. In two years she'll only be twice as old as Jack. How old are Liz and Jack now?
1 answer