Respuesta :

Explanation:

Let's call x the number of boxes of candy that Sean sold and y the number of boxes of candy that Marta sold.

Then, Sean sold 4 more boxes of candy than Marta, so we can write the following equation:

x = 4 + y

Additionally, the sum of the boxes they sold was 22, so:

x + y = 22

Now, we can replace the first equation on the second one as:

x + y = 22

(4 + y) + y = 22

So, solving for y, we get:

4 + y + y = 22

4 + 2y = 22

4 + 2y - 4 = 22 - 4

2y = 18

2y/2 = 18/2

y = 9

Finall

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