5x²-4(x²+1)how to factorise this?
1 answer:
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Step-by-step explanation:
Let's represent the number of mochas bought with the variable , and the number of lattes bought with the variable
.
Since there are students, the total number of mochas and lattes bought must be
. This can be represented with the following equation:
We can also set up another equation based on the total amount spent on the coffe:
If we rearrange the first equation, we can solve for :
If we substitute this into the second equation, we can solve for :
Subtituting this back into the original equation, we can solve for :
Therefore, 9 mochas and 14 lattes were bought.