John spends $94 to buy packages of cleaning supplies for a camp. he buys t packages of towels; each package is $6 and contains 8 towels. he also buys s packages of soap; each package is $4 and contains 10 bars of soap. john buys 20 packages of cleaning supplies altogether. write a system of two equations to represent the packages of cleaning supplies john buys. how many packages of towels does john buy? explain why it would not be possible for john to buy exactly 16 bars of soap