Answer: You bought 7 books and you also bought 4 magazines

Explanation:

x = # of books purchased

y = # of magazines purchased

System of equations:

8x + 5y = 76
x + y = 11

Let’s use elimination in this case, but substitution can also work.

8x + 5y = 76
Multiply the (x + y = 11) by -8

We get:

8x + 5y = 76
-8x - 8y = -88
The xs cancel.
Add like terms.
-3y = -12
Divide by -3 on both sides
y = 4

Now plug in 4 into the (x + y = 11) equation to get x.

x + (4) = 11
Subtract 4 on both sides
x = 7

4 0

3 years ago

Read 2 more answers

A bag contains red, yellow and green sweets.2/5 of the sweets are red and 1/4 of the sweets are yellow. What fraction of the swe

Sauron [17]

Answer:

Let x = the number or green sweets

Let x + 8 = the number of red sweets

red/green: (x + 8)/x = 5/3 Cross multiply

5x = 3(x + 8)

5x = 3x + 24

2x = 24

x = 12 green sweets

3 0

3 years ago