Math Review: Patterns and Algebra

Basic Algebra

100

3 + x = 10

x=7

200

21 - t = 15

t=6

300

3p = 24

p=8

400

16 / r = 2

r=8

500

3x + 4 = 10

2

Two Variables

100

3 + x = 2 + s    if s = 10

x=9

200

4c = 10 + y      if y=10

c=5

300

10x - 2 = y    if x = 3

28

400

11f - 3 = g    if f = 5

g=52

500

3d + 3z = k     if d=7  and z=10

51

Word Problems

100

Jack has 17 apples. He gave 3 to his mom. How many apples does he have left? Make sure to write your answer in algebraic form (a=?)

a = 14

200

Finn has 50 chickens. He gives some away and has only 11 left. How many did he give away? 

c=39

300

The number of students double. That equals 62. What was the original number of students? 

31

400

Klover divides her skittles into 5 bags. She has 90 skittles.  How many skittles are in each bag? 

s=22

500

Robbie multiplies his baseball cards by 3. He then gives 5 away. He is left with 1 card. How many cards does he originally have? 

c=2