Game Development Reference
In-Depth Information
d.
6b
2
12 ¼ 2
e.
2
x
3
7
¼
f.
r
5
¼ 9
6
7
t ¼
6
7
g.
r
4
¼ 13
h.
1
6
¼
2
3
i. b
j.
1
3
10
5
þ x ¼
Combining Operations
Your ability to solve equations substantially increases when you combine addi-
tion and multiplication. With the combination of operations, you can proceed to
undo relations that have bound numbers to each other in several ways. Here is an
equation that combines numbers through addition and multiplication. You use
division and subtraction to undo the relations. You begin by working with the
addition:
2
x þ
3
¼
7
2
x þ
3
3
¼
7
3
Undo the addition
:
2
x þ
0
¼
4
2
x
2
¼
4
2
:
Then undo the multiplication
x ¼
2
When you work with an expression such as 2x
þ
3, to solve for
x
you begin by
removing the integer 3 from the left side of the equation. You then remove
the coefficient of
x
, 2. To remove the 3 from the right side, you subtract it
