So for this, I will be using the elimination method. So firstly, multiply both sides of the first equation by 2 and both sides of the second equation by 3:

Now add the two equations to get
. From here you can solve for x. For this, just divide both sides by 17, and your first answer will be 
Now that we have the value of x, substitute it into either equation to solve for y:

<h3><u>In short, x = 5 and y = -2.</u></h3>
Answer:
So estimate.
Really depends on what needs to be estimated, the answer or the overall equation.
So doing the real one first.
283/11 = 25 8/11
You can’t have “part” of a student so rounding this you can go up since 8 is more then half of 11
So 26 students
If you were to round the overall equation then you’d get
280 / 10 which is 28 students per class
So two options.
I think its the last one, Aidan can expect to save about $27.52 each week. Hope I was correct
I used an app to send a picture because I couldn’t write it how it looks