Paul buys a number of large sacks of fertiliser costing $ x each. He spends $ 27.
a) write down, in terms of x, an expression for the number of large sacks which paul buys.
b) Rula buys a number of small sacks of fertiliser. Each small sack costs $ 2 less than a large sack. Rula spends $ 25.
Write down in terms of x, an expression for the number of small sacks which Rula buys.