Combine like terms-- you can combine the k's:

Now you have:

Simply divide both sides by 2.5 to find the value of k:
X is equal to -3.2 and y is equal to -8
Answer:
She should use 3/8 cup of jalapenos.
Step-by-step explanation:
This is because 1 1/2 is three times of 1/2 so you times 1/8 by three as well which equals to 3/8 cup of jalapenos.