Well, darling, there are two 3s in 78. Simple math, really. But hey, if you need help with anything else, I'm here to sprinkle some sass on it.
L + S = 72 so L = 72 - S; 4L - 3S = 78 ie 4(72 - S) - 3S = 78 ie 288 - 4S - 3S = 78 ie 7S = 210 so S = 30 and L = 42. And there you have it!
28 3s
9
24 of them
There are: 21/3 = 7
L + S = 72 so L = 72 - S; 4L - 3S = 78 ie 4(72 - S) - 3S = 78 ie 288 - 4S - 3S = 78 ie 7S = 210 so S = 30 and L = 42. And there you have it!
28 3s
To find out how many 3s go into 140, divide 140 by 3. This gives you approximately 46.67. Since we're looking for whole 3s, you can fit 46 complete 3s into 140.
37.6666667
16
9
4
2,560
3000/3 = 1000
203
There are: 21/3 = 7
24 of them