Question

Julie buys 2kg of apples and 7 kg of pears for £12.70. The pears cost £1.30 per kilogram. What is the price per kilogram of the apples?

Answer 1

Let's say a stands for apples and p for pears
We know that
$p = 1.30$
And

$2a + 7p = 12.70$
In order to know what the cost of an "a" is we have to put the value of the p in the second equation, which means

$2a + 7 \times (1.30) = 12.70$
$2a = 12.70 - 9.10$
$2a = 3.60$
And
$a = 1.80$
The price of per kilo for apples is 1.80

Answer 2

Question

Julie buys 2kg of apples and 7 kg of pears for £12.70. The pears cost £1.30 per kilogram. What is the price per kilogram of the apples?

Answer:

1.80 £

Step-by-step explanation:

find the price of pears

7kg * 1.30£ = 9.1£

from the total price take away the cost of pears

12.70 - 9.1 = 3.6 £ (price of 2Kg of pears)

3.6 : 2 = 1.80 £ ( cost of 1 Kg of apples)

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or you can solve with an expression

12.70 - (7 * 1.3) : 2 =

1.80 £