Solve Equations Adding and Subtracting

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

• subtract 8n to both sides

• multiply 6n to both sides

• combine the like terms 4n + -6n

• add 1 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

What is the error?

• Adding 2x to 3x

• Subtracting 5 from both sides

• Adding 2x to -2x

• Dividing by 5 on both sides

Tags

CCSS.HSA.REI.A.1

Solve:
2x + 1 = 2x - 1

• No Solution

• x = 0

• Infinitely Many Solutions

Tags

CCSS.8.EE.C.7A

3(x-8)=3x-24

• No Solution

• x=3

• Infinite Solutions

Tags

CCSS.8.EE.C.7A

Solve:
a + 69 = 72

• 3

• 141

Tags

CCSS.6.EE.B.7

Solve: 
b - 43 = 188

• 231

• 145

Tags

CCSS.6.EE.B.7

What is the first step to solve this equation?
y - 5 = 22

• Subtract 5 from both sides

• Subtract 5 from one side and add to the other

• Add 5 to both sides

• Add five to one side and subtract 5 from the other

Tags

CCSS.6.EE.B.7

What is the inverse operation of adding (+)?

• Adding (+)

• Subtracting (-)

• Multiplying (×)

• Dividing (÷)

Tags

CCSS.HSA.REI.A.1

What is the inverse operation of subtracting (-)?

• Adding (+)

• Subtracting (-)

• Multiplying (×)

• Dividing (÷)

Tags

CCSS.7.NS.A.1C