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One-step equations
Combine Like terms
Multi-step Equations
Mystery Number
Miscellaneous
100

x + 2 = 5

x = 3

100

8a + 15a + a + 9

24a + 9

100

2x + 4 = 6

x = 1

100
The sum of the mystery number and 8 is 24.
n + 8 = 24 The mystery number is 16.
100

How do you make the number 7 an even number without addition, subtraction, multiplication, or division?

Drop the 's' in the word seven
200

n - 18 = 47

n = 65

200

-7w - 5 + 17w + 15

10w + 10

200

7x + 3 = 31

x = 4

200
The difference of the mystery number and 15 is 43.
n - 15 = 43 The mystery number is 58.
200
What are the names of your teachers?

      

300
b + 41 = 23
b = -18
300

5z - 55 - 26 - z

4z - 81

300

1/2c - 11= -21

c = -20

300
The product of the mystery number and -7 is 84.
-7n = 84 The mystery number is -12.
300

I am a three-digit number. My second digit is 4 times bigger than the third digit. My first digit is 3 less than my second digit. Who am I?

141

400

y - 12 = -43

y = -31

400

-5r + 3q - 8q - r

-6r -5q

400
13= -2(y - 4) +3y

y=5

400
The quotient of the mystery number and -4 is -12.
The mystery number is 48.
400

x – 8 - 2 = 3x – 10 – 2x

Infinitely Many Solutions

500
y - 8.6 = -32.5
y = -23.9
500

53t - (-20r) + 17 - 10t

43t + 20r +17

500

-4(2m+5)-3m=35

m= -5

500
3 more than twice the mystery number is 31.
3 + 2n = 31 The mystery number is 14.
500

2(3x + 5) = 22 + 6x – 6

No Solution