Alan grows tomatoes in his greenhouse. He uses a liquid fertiliser to help increase his yield. The instructions on the fertiliser state, "Dilute 2 capfuls of fertiliser into a watering can containing 5 litres of water". How much fertiliser does he need for 10 litres of water? Also - How much water does he need for 6 capfuls of fertiliser?

4 capfuls of fertilizer

15 liters of water

Step-by-step explanation:

The instructions state that a  fertilizer/water ratio of 2 capfuls: 5 liters should be used.

Following that ratio, the amount of fertilizer required for 10 liters of water is:

The amount needed is 4 capfuls of fertilizer.

The amount of water required for 6 capfuls of fertilizer is:

The amount needed is 15 liters of water.

step-by-step explanation:

first, eliminate the parenthesis:

3

x

+

2

−

4

x

second, group like terms:

3

x

−

4

x

+

2

third, combine like terms:

(

3

−

4

)

x

+

2

→

−

1

x

+

2

→

−

x

+

2