Check the picture below, solve for "a" and "b"
Let c and d be the number of cds and dvds respectively.
c+d=12
c=12-d
The we are told that:
2c+3d=31, using c found above in this equation gives you:
2(12-d)+3d=31
24-2d+3d=31
24+d=31
d=7
So Phillip bought 7 dvds.
check...
3*7+2(12-7)=31
21+2(5)=31
21+10=31
31=31
Answer:
11/8 or 1 3/8
Step-by-step explanation:
Dont worry about this sksndjdndjdjksksownsjshsjjsajjskskalalksneksjsjsks
Change them all into the same unit of measurement and you will see which is the furthest out by default.