Simple Multi-Step Equations

Solve the equation 3x + 15 = 45

• x = 10

• x = 20

• x = -20

• x = 5

The objective when solving an equation is to....

• isolate the variable.

• check the solution.

• guess and check.

• Combine Like Terms.

Using the "opposite operation" to "undo" and isolate the variable when solving an equation is more commonly called...

• Inverse operations

• math

• variable

• PEMDAS

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 3 on both sides.

• 1.5

• 6

• -6

• -1.5

Solve for x

• 35

• 3.5

• 0.35

• -35

The steps in solving 4x + 5 = 23 are: 

• Add 5 to both sides and divide both sides by 4

• Add 5 to both sides and multiply both sides by 4

• Subtract 5 from both sides then multiply both sides by 4

• Subtract 5 from both sides then divide both sides by 4

What is the SECOND step to solving this equation: 8x - 25 = 57

• add 25 to both sides 

• multiply 8 to both sides 

• divide both sides by 8

• divide both sides by 25

The main point to solving an equation is to....

• get x by itself

• check the solution.

• guess and check.

• hope you get the right answer.

Solve the equation 2x + 8 = 20

• x = 2

• x = 6

• x = 10

• x = 12