There were a total of 162 tables and benches in a school field. There were 2 times as many benches as tables. After 18 benches and some tables were removed, there were 5 times as many benches as tables left. How many tables were removed from the school field?
Let the number of tables==T
Then the number of benches ==2T
T + 2T ==162
3T == 162
T ==162 / 3 ==54 tables
54 x 2 ==108 benches.
[108 - 18] / [54 - t] =5*B / B, solve for t
t==36 tables were removed.
Check: [108 - 18] / [54 - 36]==90 / 18 ==5 times as many benches as tables left.
