Two-Step Equations Practice

Two-Step Equations Practice

Expression

• mathematical phrase with a combination of numbers, variables and operations

• Does not have an equal sign

Equation

• two expressions set equal to each other

• DOES contain an equal sign ( = )

Multiple Choice

The following example is an EQUATION:

2x + 9 = 19

• TRUE

• FALSE

Multiple Select

Place a check mark beside all EXPRESSIONS

• -3x = 18

• 7y

• -25

• m + 8

• -10 = y - 3

How to solve a two-step equation

• You need to isolate the variable

• To isolate the variable, take care of the constant (loner number) using INVERSE operations

• keep the equation balanced by performing the same operation on both sides of the equal sign

Multiple Choice

What is the first step in solving the equation: -3x + 6 = 18?

• add 6 to both sides

• subtract 6 from both sides

• subtract 6 from the left side of the equation only

• subtract 6 from the right side of the equation only

Solve: -3x + 6 = 18

• subtract 6 from both sides

• -3x = 12

• divide both sides by -3

• x = -4

Solve: 10 + 4x = - 22

• subtract 10 from both sides

• 4x = -32

• divide 4 on both sides

• x = -8

Multiple Select

When solving 3x + 1 = 31, please choose the correct steps below

• Subtract 1 on both sides

  Divide by 3 on both sides

• Add 1 on both sides

  Divide by 3 on both sides

• Divide by 3 on each side first, then add 1 on each side

Multiple Choice

 $Solve:-2x\ -\ 12\ =\ 40$  

• 14

• 26

• -26

• -14

Multiple Choice

 $Solve:\ \ \ 12\ -\ 5x\ =\ -18$  

• 6

• -6

• -1.2

• 1.2

Multiple Choice

 $Solve:\ \ \ 7x\ +\ 23\ =\ 37$  

• 8.5

• 7

• 2

• -2

Multiple Choice

 $Solve:\ \ 8\ -\ 2x\ =\ 15$  

• 3.5

• 11.5

• -11.5

• -3.5