Game Development Reference
In-Depth Information
In this instance, the actions you take amount to undoing or reversing the actions
you take when you perform the subtraction. Still, by adding the same value to
both sides, you eliminate terms to the point that you are left with only
x
and its
value.
With both forms of the equation, when you substitute your final answer back
into the original equation, you can check your solution. Here is the equation
involving addition:
x þ
3
¼
7
ð
4
Þþ
3
¼
7
7
¼
7
Here is the equation involving subtraction:
x
3
¼
7
ð
10
Þ
3
¼
7
7
¼
7
Exercise Set 5.1
a. x þ 5 ¼ 45
b. x 12 þ 25 ¼ 415
c. 6x 12 þ 25 ¼ 2x þ 3
d. 5b 125 ¼ 2b þ 33
e. t þ 9 ¼4
f. 5 ¼ t þ 8
g. w 8 ¼ 5
h. y 6 ¼14
i. 4c 5 ¼ 5c þ 8
j. 35 ¼ 6y 5
