Checkpoint

Which first move puts a on one side of 8a + 5 = 3a + 25?

• Take `3a` off both sides
• Add `3a` to both sides
• Take 5 off both sides

6(w + 2) = 48. What does sharing both sides by 6 give?

• `w + 12 = 8`
• `w + 2 = 8`
• `w + 2 = 48`

Take 3p off both sides of 3p + 8 = 3p + 11. What is left?

• `0 = 3`, so `p` is 0
• `8 = 11`, so no number fits
• `p = 3`

7x + 2 = 2x + 22 is followed by 5x + 2 = 22, then 5x = 24, then x = 4.8. Which is the first wrong line?

• `5x + 2 = 22`
• `5x = 24`
• `x = 4.8`

A solution says x = 6 for 4x − 3 = 21. What do you find when you put 6 back?

• Left 27, right 21. It does not fit
• Left 21, right 21. It fits
• Left 24, right 21. It does not fit