57 + 42 = 99
If X+Y = 42, and 2X + Y = 57, then if you subtract the first equation from the second, 2X + 1Y = 57 1X + 1Y = 42 - ---------------- 1X + 0Y = 15 That means that Y = 27. 15 + 27 = 42 15 + 15 + 27 = 57.
57/42 = 19/14
the answer of the average of 42, 57, and 63 is 54.
2:45 + 3:57 = 6 hours 42 minutes
57 + 57 + 38 + 38 = 190
5/7 of 42 is 30.
The GCF is 3.
56 plus 1 equals 57. == ==
57+57 equals 204
23.94
It is: 798
32 plus 25 is 57.