Solving Equations

Solve for x

100

-15 = 5x

x = -3

200

2a + 11 = 35

x = 12

300

5m - 7 = 23

x = 6

400

-3x - 24 = -33

x = 3

500

6x - 14 = -41

x = -4.5

Name the Steps

100

-4x = 24

1) Divide both sides by -4

x = -6

200

2k + 5 = 17

1) Subtract 5 from both sides.

2) Divide both sides by 2.

x = 6

300

6k - 5 = 43

1) Add 5 to both sides

2) Divide both sides by 6

x = 8

400

9x + 35 = -73

1) Subtract 35 from both sides

2) Divide both sides by 9

x = -12

500

k/8 + 21 = 97

1) Subtract 21 from both sides

2) Multiply both sides by 8

x = 608

Write/Solve Word Problems

100

15 times a number is -60.

15x = -60

x = -4

200

The sum of -45 and a number is -10.

-45 + x = -10

x = 35

300

The sum of -4 times a number and 10 is 22. 

-4x + 10 = 22

x = -3

400

A mechanic charges $40 per hour (h), plus the cost of the parts, which was $25. Your total bill was $105. How many hours did the mechanic work?

40h + 25 = 105

h = 2

500

A rock climber is 300 feet off the ground. Every minute (m), she descends 24 feet. After how many minutes will she be 180 feet off the ground?

300 - 24m = 180

m = 5