Question

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.

Answer 1

a)First, let the large sacks be 'l'.  If one is large sacks is l so its obvious that it should be equal to lx. SO the equation is nothing but 27=lx.
b)So lets take s as small sacks. Then the equation is S(x-2)=25.

Answer 2

Given:  Paul buys a number of large sacks of fertiliser costing $ x each

To Find :  expression for the number of large sacks which paul buys.

Solution:

Paul buys a number of large sacks of fertiliser costing $ x each

number of large sacks which paul buys = n

=> Cost of  n large sacks of fertiliser = n * x  $

Paul spends $ 27.

=> nx = 27

=> n = 27/x

27/x  is the Expression for the number of large sacks which paul buys

Rula buys a number of Smaller sacks of fertiliser costing $ (x-2) each

number of large sacks which Rula buys = p

=> Cost of  p smaller sacks of fertiliser = p * (x-2)  $

Rula spends $ 25.

=>  p * (x-2) = 27

=> p = 25/(x - 2)

25/(x - 2) is the Expression for the number of large sacks which Rula buys

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