Steps for Solving Equations

What is the first step in solving the following equation:

3x - 5 = 20

• multiply both sides by 5

• add 5 to both sides

• divide both sides by 5

• subtract 5 from both sides

Solve: 6 = a/4 + 2

• a = 14

• a = 15

• a = 16

• a = 20

Solve: 63 + 7k = 84

• k = 3

• k = –3

• k = 5

• k = –5

Solve: m/9 - 1 = -2

• m = –18

• m = 9

• m = –9

• m = 18

Solve: 144 = –12x - 60

• x = –7

• x = -17

• x = 14

• x = 1

The goal of solving a two-step equations is:

• to use substitution.

• to find the coefficient.

• to find the value of the variable.

• to isolate the coefficient.

What is the first step to solve this equation:

11 - 3x = 44

• Add 3 to both sides.

• Subtract 11 from both sides.

• Add 11 to both sides.

• Divide both sides by -3.

Solve: -3 + 2x = -1

• x = 3

• x = 2

• x = 1

• x = -2

What is the first step in solving 9 - 5t = 24 ?

• Divide by 5 on both sides

• Divide by –5 on both sides

• Add 9 on both sides

• Subtract 9 from both sides

Tags

CCSS.7.EE.B.4A

What is the first step in solving the equation?

• Add 2 on both sides

• Subtract 2 from both sides

• Multiply by 5 on both sides

• Multiply by –5 on both sides

Tags

CCSS.HSA.REI.A.1