9 of 12 Nasser is following this recipe to make flapjacks.
Nasser uses 0.9 kg of oats.
How many flapjacks is Nasser making?
Recipe: Makes 10 flapjacks
120 g margarine
100 g sugar
150 mL syrup
225 g oats
40 g sultanas

40 flapjacks

Step-by-step explanation:

Given the recipe :

Recipe: Makes 10 flapjacks

120 g margarine

100 g sugar

150 mL syrup

225 g oats

40 g sultanas

Given that all other ingredients are kept Constant.

225g of oats produces 10 flapjacks

0.9 kg of oat = 0.9 * 1000 = 900g oat

If :

225 g = 10 flapjacks

900 g = x

Cross multiply :

225x = 900 * 10

225x = 9000

x = 9000 / 225

x = 40

40 flapjacks

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0