Ava bought some pens for $ 2 each and some pencils for $ 1 each. She bought 3 more pens than pencils and spent a total of $ 12.
How many pencils did Ava buy?
1 answer:
Answer:
Step-by-step explanation:
price of 1 pen= $ 2
price of 1 pencil= $1
total money spent= $12
Let the number of pen be a and number of pencil be b.
2 a + b = 12 ----------------Equation 1
We have, she bought 3 more pens than pencils
a - b = 3 ------------------ Equation 2
Equation 1 +Equation 2,
2 a + b + a - b = 12 + 3
3a = 15
a = 5
Substituting in equation
5 - b = 3
b = 2
Number pencils Ava bought = 2
You might be interested in
Let the required number be x, then 10 + x/6 = 5
x/6 = 5 - 10 = -5
x = 6 x -5 = -30
x = -30
Answer: Circle
Step-by-step explanation:
-6x - 2y = -18
-6x - 2(0) = -18
-6x - 0 = -18
-6x = -18
-6 -6
x = 3
hope this helps :)
I think it means expires. I'm not sure though
Answer:
7 times
Step-by-step explanation:
$49/$7 each time = 7 times
