Equations!

Addition

100

x + 5 = 17

x = 12

200

x + 14 =-21

x = -35

300

4 + x = -5

x = -9

400

x + 4.9 = 7.4

x = 2.5

500

x + 2/5 = 1/6

-7/30 = x

Subtraction

100

x - 2 = 6

x = 8

200

d - 7 = -9

d = -2

300

k - (-83) =121

k = 38

400

m - 3.7 = 2.4

m = 6.1

500

x - 2/3 = 1/4

x = 7/6

Multiplication/Division

100

9x = -27

x = -3

200

-7x = -63

x = 9

300

y/-6 = 2

y = -12

400

-28 = a/-13

a = 364

500

-80 = x/15

x = -1200

Two Step

100

2k + 5 = 17

x = 6

200

3a - 5 = 4

a = 3

300

k/8 + 21 = 97

k = 608

400

y/9 - 18 = 52

y = 630

500

19b + 314 = 1663

b = 71

Word Problems

100

Lynn is cooking cookies. The recipe calls for 14 cups of flour. She has already put in 4 cups. How many more cups does she need to put in? What is the equation?

10 cups of flour

x+4=14

200

How many packages of socks can you buy with $80 if one package costs $16? What is the let x statement? What is the equation?

5 packages 

16x=80

300

Bryan decided to bring his wallet to the bank to cash it in. On the way, he dropped it and lost $2.50. He had $14.84 left in the wallet. How much did he start with? What is the let x statement? What is the equation?

$17.34 

x-2.50=14.84?

400

You are on page 286 in Twilight. If there are 408 pages in the book, how many more do you have to read? What is the let x statement? What is the equation?

122 pages 

x+286=408?

500

Mary and Kate both work at the 7-11. Mary earns $3.94 more than Kate. If Kate earns $17.90 an hour how much does Mary make? What is the let x statement? What is the equation?

$21.84

 x-3.94=17.90?