Solving 2-step Equations

Solving 2-step Equations

Multiple Select

Check all of the equations that require you to use ADDITION to isolate the variable.

• g - 8 = 9

• y + 5 = 15

• d - 2 = 4

• r + 6 = 10

• m - 9 = 8

Multiple Select

Check all of the equations that require you to use SUBTRACTION to isolate the variable.

• g + 8 = 9

• y - 5 = 15

• d + 2 = 4

• r - 6 = 10

• m + 9 = 12

This next equation is going to look a little different...

We are not going to solve it completely yet, but I think we can figure out the first step.

Multiple Choice

How would you isolate "4x" in this equation?

4x - 3 = 17

• subtract 3 from both sides

• add 3 to both sides

• divide both sides by 3

• multiply both sides by 3

When solving 2-step equations, step one will be to either ADD or SUBTRACT.

4x - 3 = 17

• First, we need to isolate the "4x"

• We do that by ADDING 3 to both sides to cancel the "-3"

• We are then left with 4x = 20

Multiple Choice

How do we isolate the "x" and get it all by itself?

4x = 20

• subtract 4 from both sides

• add 4 to both sides

• divide both sides by 4

• multiply both sides by 4

Step 2 is to multiply or divided.

4x = 20

• In this equation, our second step will be to divide both sides by 4.

• That isolates the "x" and gets it all by itself.

• Our solution is x = 5.

Multiple Choice

What is the first step to solving this problem? Remember, our first step involves ADDING or SUBTRACTING.

2x + 5 = 11

• subtract 5 from both sides

• add 5 to both sides

• divide both sides by 5

• multiply both sides by 5

Multiple Choice

What is the second step not that we have 2x = 6? How do we isolate the "x" and get it all by itself?

• subtract 2 from both sides

• add 2 to both sides

• divide both sides by 2

• multiply both sides by 2

Multiple Choice

When solving 2 step equations, what is our first step?

• undo addition and subtraction first

• undo multiplication and division second

Multiple Choice

When solving 2 step equations, what is our second step?

• undo addition and subtraction first

• undo multiplication and division second

Open Ended

Solve this 2 step equation on your own. Show your work on a piece of paper.

2g - 3 = 7