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Equations Lesson 3
供稿人: Schuller Glase
-2a
4a + 1 = 2a + 7
2a + 1 =
2a =
-1   -1
2
a = 3
6
3b + 5 = b + 15
-b
+ 5
-5     -5
2
b = 5
= 15

= 10

Notice! The Pronumerals are on the same side!

7b + 7 - 2b + 3 = 32

 

5b + 10 =
-10    -10
b = 4.4
= 22
5
+ 3a           +3a
5a - 4 = -3a
8a- 4 =
8a =   4
a = 0.5
 +4

8

(hint: do not be

afraid of 0)

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