113k views
20 votes
3 balloon + 2 cakes = £19

9 balloon + 3 cakes = £42

work out:
1 balloon in £
1 cake in £

1 Answer

9 votes

Explanation:

3 balloons + 2 cakes = £19

=> 9 balloons + 6 cakes = £57 (multiply by 3)

9 balloons + 6 cakes = £57

- (9 balloons + 3 cakes = £42)

=> 3 cakes = £15, 1 cake = £5.

Therefore 3 balloons + 2(£5) = £19,

3 balloons = £9, 1 balloon = £3.

Hence each balloon is £3 and each cake is £5.

User John Shields
by
7.2k points
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