How do I write this equation out and solve it?

Mike and his friends bought cheese wafers for $2 per packet and chocolate wafers for $1 per packet at a carnival. They spent a total of $25 to buy a total of 20 packets of wafers of the two varieties.

Part A: Write a system of equations that can be solved to find the number of packets of cheese wafers and the number of packets of chocolate wafers that Mike and his friends bought at the carnival. Define the variables used in the equations. (5 points)

Part B: How many packets of chocol

Question

How do I write this equation out and solve it?

Mike and his friends bought cheese wafers for $2 per packet and chocolate wafers for $1 per packet at a carnival. They spent a total of $25 to buy a total of 20 packets of wafers of the two varieties.

Part A: Write a system of equations that can be solved to find the number of packets of cheese wafers and the number of packets of chocolate wafers that Mike and his friends bought at the carnival. Define the variables used in the equations. (5 points)

Part B: How many packets of chocol

loganator · Answer

Don't worry about part B

anonymous · Answer

2p + 1c =25 would be for the price, but the question would then be how to integrate 20 in there.

loganator · Answer

There are supposed to be two equations

loganator · Answer

I am supposed to combine them to find out x and y

mrnood · Answer

so you have 2 unknowns - the number of chocolate packs and th enumber of cheese packs

let's call them c = number of chocolate packs and d = number of chees packs

you know what the total number of packs the y bought is so can you start by writing 1 equation for that?

loganator · Answer

so we have 2d = . . .

mrnood · Answer

no - start with the total number of packs (you are told what that number is)

write an equation 

total number of pack = (~c~d) i.e something with c and d in it