Question 1152205

Jame is seven years older than Amy. Twelve years ago, Amy was half as old as Jane is now. How old is Jane now?
Show steps please! Thanks!
<pre>Let Jane's age be J
Then Amy's is J - 7
We then get: {{{highlight_green(matrix(7,3, J - 7 - 12, "=", (1/2) * J, J - 19, "=", J/2, 2J - 38, "=", J, - 38, "=", J - 2J, - 38, "=", - J, (- 38)/(- 1), "=", J, 38, "=", J))}}}