Two equal equations
So I have a math project that has something to do with t-shirt companies. I have to find the number of shirts that make both company prices equal.
The first equations is 78+5x=y, the second is 120+3x=y. I've already tried up to 36 shirts. Thanks for any help.
January 11, 2014
3 Comments • Newest first
Oh wow, I totally missed that. Well, thanks guys.
78+5x=y
120+3x=y
78+5x=120+3x (substitution)
2x=42
x=21
they would be equal if you make 21. unless im being a complete tard
78+5x=120+3x
5x=42+3x
2x=42
x=21