One-Step Equations Review

One Step Equations

Solving Equations

• Use inverse operation to isolate the variable

• Keep the equation balanced by performing the operation to both sides of the equal sign.

Solve y +14=20

• The inverse operation of addition is subtraction.

• Subtract 14 from both sides of the equal sign

• 20-14=6

• y=6

Solve x -120 = 80

• The inverse operation of subtraction is addition

• Add 120 to both sides of the equal sign.

• 80 +120= 200

• x=200

Solve 3n=12

• The inverse operation of multiplication is division

• Divide both sides by 3

• 12/3=4

• n=4

• The inverse operation of division  is multiplication 

• Multiply both sides by 2

• 16(2)=32

• k=32

Multiple Choice

What is the inverse operation of Multiplication?

• addition

• subtraction

• multiplication

• division

Multiple Choice

What is the inverse operation of addition?

• addition

• subtraction

• multiplication

• division

Multiple Choice

What is the inverse operation of subtraction?

• addition

• subtraction

• multiplication

• division

Multiple Choice

What is the inverse operation of Division?

• addition

• subtraction

• multiplication

• division

Multiple Choice

Find the value of a: 12 = 4a

• 48

• 3

• 8

Multiple Choice

x + 12 = 20

• x = 32

• x = -32

• x = 8

• x = -8

Multiple Choice

Solve for x:

• x = 20

• x = 7

• x = 10

• x = 3

Multiple Choice

Solve the equation
3x = 27. 

• x = 24
• x = 81
• x = 9

Multiple Choice

x - 32 = 49

• x = 17
• x = 71
• x = 81
• x = 49

Multiple Choice

Find the value of a: $$12\ =\ \frac{a}{4}$$  

• 48

• 3

• 8

Multiple Choice

c - 5 = 8

• 3

• 13

• 5

• 8

Multiple Choice

$$21\ =\ 14\ +\ x$$  

• x = 7

• x = 35

• x = 294

• x = 1.5

Multiple Choice

Find the value of m: $$\frac{m}{5}\ =\ 10$$  

• 2

• 5

• 50

Multiple Choice

Find the value of the variable: m + 4 = 12

• 16

• 8

• 48

• 3

Multiple Choice

If the triangle represents the variable and each circle equals one, is this model and equation in the image correct?

• Yes

• No, there needs to be 7 circles on the right side of the equal sign.

• No, there needs to be 4 circles on the right side of the equal sign.

• No, there needs to be a minus sign in the equation.

Multiple Choice

Which equation matches the image? THE RECTANGLES ARE THE VARIABLES & THE SQUARES EQUAL ONE EACH.

• x - 3 = 8

• x + 3 = 8

• 3x = 8

• 3x = 9

Multiple Choice

What equation is modeled?  Solve the equation.

• x -6 = 13     x = 19
• x + 6 = 13    x = 7
• x + 6 = 13    x = 8
• x - 6 = 13   x = 7

Multiple Choice

What equation is modeled?

• 3 = 6

• 3x = 6

• x = 6

• 3 = 6x

Multiple Choice

Which equation is modeled?  Solve the Equation

• x - 6 = 15       x=21

• x + 6 =15   x = 9

• 6x = 15     x = 2

Multiple Choice

What equation is modeled?  Solve the equation.

• 2x = -4    x = -2

• 2x = 4    x = 2

• 2x = 4    x = 8