Question

A company sells kites. It sells basic kites and designer kite's. 2 basic kites and 2 designer kites have a total weight of 400 g. 4 basic kites and 1 designer kite have a total weight of 440 g. Work out the weight of a basic kite and the weight of a designer kite.

Answer 1

Answer:

basic = 80g

designer = 120g

Explanation:

simultaneous equations:

2B + 2D = 400g
4B + D = 440g -> D = 440 - 4B

to work out B:
2B + 2(440 - 4B) = 440
2B + 880 - 8B = 440  # divide whole thing by 2 to make it simpler
B + 440 - 4B = 220
-3B = -240 # divide both sides by -1
3B = 240
B = 80

to work out D: (substitute B)
4(80) + D = 440g
320 + D = 440g
D = 120