There are a total of 50 apples and pears (apples + pears) in a large basket. If the total number of apples was doubled and the total number of pears was tripled, these two numbers would add up to 130. How many apples and pears are in the basket?
Solve this simultaneously.
Where a= apples and p= pears,
a+p=50 and 2a+3p=130
Multiply a+p=50 by 2 on both sides to get:
2a+2p=100
Then subtract the two equations from each other:
2a+3p=130
2a+2p=100
--------------- --> 2a-2a=0 ; 3p-2p=p ; 130-100=30
0+p=30
So p=30 (number of pears)
Which means that a is:
a+p=50 , where p=30
a+30=50
a=50-30=20 (number of apples)
CB
Related Maths GCSE answers
All answers ▸I decrease a number by 26%, the answer is 9 x10^-7, what was the original number?
The probability of obtaining heads on a biased coin is 0.4. The coin is tossed 600 times. Write down the mean number of heads and the standard deviation of the number of heads.
How do I do the dot product with vectors?
x = 0.436363636... . Prove algebraically that x can be written as 24/55.