Equations on Both Sides of the Equations

Where is the first mistake?

• Subtracting 3 on both sides

• Distributing the 9

• Subtracting 9x on both sides

• Inequality error

Where is the first mistake?

• Distribution of the 5

• Distribution of the 10

• subtracting 60x from both sides

• dividing by -50

Tags

CCSS.HSA.REI.A.1

What is the first step you should take to solve this problem?

-3(x - 2) = -8 +9b

• add 8 to both sides

• subtract 9b from both sides

• Distribute -3 to the x and -2

• add 2 to both sides

Tags

CCSS.7.EE.B.4A

Jacob solved the following equation using the steps shown.

Step 1 5x + 9 = 2x - 3

Step 2 3x + 9 = -3

Step 3 3x = -12

Step 4 x = -4

What operation did he perform to get from Step 1 to Step 2?

• Subtracted 2x from both sides of the equation

• Subtracted 9 from both sides of the equation

• Multiplied both sides of the equation by 3

• Added -3 to both sides of the equation

Tags

CCSS.HSA.REI.A.1

What is the next step you should take?

1 + 4n = 10 - 14n

• Collect the variables (letters) to the left

• add 1 from both sides

• subtract 14n to both sides

5w + 5 = 8w - 10

• -5

• -2

• 2

• 5

Solve the equation

4x - 5x + 9 =5x - 9

• x = -3

• x = 9

• x = 3

• x = -9

50 = 28.1 + 0.15a

• a= 150

• a= 146

• a= 6

• a= 155

Tags

CCSS.7.EE.B.4A

What is the next step you should take?

• add 11 to both sides

• subtract 11 from both sides

• divide both sides by 11

• divide both sides by -11

Tags

CCSS.HSA.REI.A.1

7x = 4x + 33

• x = 3

• x = 11

• x = 21

• x = 88

Tags

CCSS.7.EE.B.4A