SOLUTION: I am having difficulty setting up my word problems. What is the best way for me to figure out how to write equations, especially like the one below: The Math club bought 15 pizz

Question 286537: I am having difficulty setting up my word problems. What is the best way for me to figure out how to write equations, especially like the one below:
The Math club bought 15 pizzas. Cheese pizzas cost $9 each and specialty pizzas cost $15 each. If the total cost is $189, how many of each kind was ordered?
I came up with

$9x+$15y=$189
x+y=15
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
$9x+$15y=$189
x+y=15 or x=15-y
Now replace x with (15-y) in the first equation & solve for y.
9(15-y)+15y=189
135-9y+15y=189
6y=189-135
6y=54
y=54/6
y=9 $9 dollar pizzas were bought.
x=15-9=6 $15 dollar pizzas were bought.
Proof:
9*15+6*9=189
135+54=189
189=189
RELATED QUESTIONS
Hello I am needing help understanding word problems for arithmetic reasoning, what is the (answered by richwmiller,solver91311)

How do I find the volume of a rectangular solid: How do i find the area of the T... (answered by mananth)

i am supposed to take a test for college that has linear equations such as c+(4-3c)-2=0... (answered by Theo)

Hello, To whomever this may concern I am having trouble understanding when to write... (answered by rfer)

I am trying to figure out a word problem (I don't know why but I just can't get how to... (answered by ankor@dixie-net.com)

I am learning chapter 3 section 6, which is on "steps for solving word problems". The... (answered by ankor@dixie-net.com)

This is a word problem I am having trouble setting up. Please help! The oak street... (answered by stanbon,rapaljer)

I am having a problem grasping the factoring of quadratic equations. I have an example... (answered by Alan3354)

Hello, I've been struggling with forming equations from word problems. I love math but... (answered by josmiceli,satyareddy22)