The cafeteria at John’s work sells two kinds of sandwiches: chicken and steak. The chicken sandwich costs $1.00 and the steak sandwich costs $1.60. Today they made $66.80 from the 56 sandwiches sold.
How many of the sandwiches sold were chicken?

Question

The cafeteria at John’s work sells two kinds of sandwiches: chicken and steak. The chicken sandwich costs $1.00 and the steak sandwich costs $1.60. Today they made $66.80 from the 56 sandwiches sold. 
How many of the sandwiches sold were chicken?

anonymous · Answer

x = chicken
y = steak
1x + 1.6y = 66.8
x  + y = 56

anonymous · Answer

What do I insert for x or y though? :p

anonymous · Answer

solve for x in the first equation:
x + 1.6y = 66.8
-1.6y
x = -1.6y + 66.8
Now substitute this into the other equation

anonymous · Answer

Oh i thought the solution to that was the line below it (x+y=56) which had me puzzled for a moment haha

anonymous · Answer

Thats happened to me a lot:)
x + y = 56
(-1.6y + 66.8) + y = 56
And just solve for y
After you solve for y put the x into the equation and solve for x.

anonymous · Answer

Sorry **put the y value into the eqaution and solve forx

anonymous · Answer

to solve that equation, do I need to use the distributive property?

anonymous · Answer

-1.6y^2 + 66.8y = 56?

anonymous · Answer

or do I just subtract 66.8 from itself and 56.

anonymous · Answer

Sorry I took a while:/
Ok, just put it as -1.6y + 66.8 + y = 56
and solve for y. It's just combining the like terms so 
-1.6 + 1 = ?

anonymous · Answer

-.6y + 66.8 = 56
Do what you said now and subtract the 66.8 from itself and the 56