Solving Linear Equations and Inverses

What inverse operation will solve 3x = 15

• Divide by 3

• Multiply by 3

Tags

CCSS.HSA.REI.A.1

In 3x = 15, what is happening with the 3 and the x?

• They are being multiplied

• They are being divided

• They are being added together

Tags

CCSS.HSA.REI.A.1

What is the INVERSE of multiplication?

• DIVISION

• ADDITION

• SUBTRACTION

Tags

CCSS.HSA.REI.A.1

Solve: 3x = 15

• x=3

• x=18

• x=12

• x=5

Tags

CCSS.6.EE.B.7

What is the FIRST step?

3x - 8 = 15

• -8 from both sides

• +8 to both sides

• Divide both sides by 3

• subtract 15

Tags

CCSS.7.EE.B.4A

What does /3 mean?

• Divide by 3

• Subtract 3

Tags

CCSS.6.EE.B.7

How do I simplify?

-3(2x + 5) = 3x

• Use distributive property first

• Combine Like Terms first

Tags

CCSS.6.EE.A.3

What is the FIRST step?

5x+14=3x+12

• Subtract 14 from both sides

• Subtract 3x from both sides to get x on ONE side of the equal sign

How Many Solutions?

2x+5 = 2x+5

• EVERYTHING IS THE SAME so INFINITE Solutions

• NO SOLUTION

• 1 SOLUTION

Tags

CCSS.8.EE.C.7A

How Many Solutions?

2x + 5 = -2x + 5

• Infinitely Many Solutions

• No Solution

• DIFFERENT COEFFICIENTS so 1 Solution

Tags

CCSS.8.EE.C.7A