<span><span>
</span><span><span>
93
-
3
=
90
</span>
<span>
90
-
3
=
87
</span>
<span>
87
-
3
=
84
</span>
<span>
84
-
3
=
81
</span><span>81
-
3
=
78
</span>
<span>
78
-
3
=
75
</span>
<span>
75
-
3
=
72
</span>
<span>
72
-
3
=
69
</span>
<span>
69
-
3
=
66
</span>
<span>
66
-
3
=
63
</span>
<span>
63
-
3
=
60
</span>
<span>
60
-
3
=
57
</span>
<span>
57
-
3
=
54
</span>
<span>
54
-
3
=
51
</span>
<span>
51
-
3
=
48
</span>
<span>
48
-
3
=
45
</span>
<span>
45
-
3
=
42
</span>
<span>
42
-
3
=
39
</span>
<span>
39
-
3
=
36
</span>
<span>
36
-
3
=
33
</span>
<span>
33
-
3
=
30
</span>
<span>
30
-
3
=
27
</span>
<span>
27
-
3
=
24
</span>
<span>
24
-
3
=
21
</span>
<span>
21
-
3
=
18
</span>
<span>
18
-
3
=
15
</span>
<span>
15
-
3
=
12
</span>
<span>
12
-
3
=
9
</span>
<span>
9
-
3
=
6
</span>
<span>
6
-
3
=
3
</span>
<span>
3
-
3
=
0
</span>
</span></span>
The first letter can be any one of 8. For each of those . . .
The second letter can be any one of the remaining 7. For each of those . . .
The third letter can be any one of the remaining 6. For each of those . . .
The fourth letter can be any one of the remaining 5. For each of those . . .
The fifth letter can be any one of the remaining 4.
The total number of possibilities is (8 x 7 x 6 x 5 x 4) = <em>6,720</em> .
(That's 8! / 3! .)
Note:
If you're allowed to use the same letter more than once,
then there are 8 choices for each of the 5 letters.
The total number of possibilities then is (8 x 8 x 8 x 8 x 8) = 32,768 .
(That's 8⁵ or 2¹⁵ .)
I'm assuming you mean, what equals x.
Well, if 7x = 94, we know that 7 x's = 94.
Therefore, is you divide 94 by 7, you will get your answer.
9 - 18
5 - 10
1 - 2
Work —
First line:
y = 2 (9)
y = 18
Second line:
10 = 2x
5 = x
Third line:
y = 2 (1)
y = 2
