Question

Which equation is an identity?

3w + 8 – w = 4w – 2(w – 4)


7m – 5 = 8m + 7 – m


–3y + 3 = –3y – 6


9 – (2v + 3) = –2v – 6

Answer 1

3w + 8 – w = 4w – 2(w – 4)

Explanation:

The simplified forms of each of these equations are ...

• 2w +8 = 2w +8 . . . . . .the identity you're looking for
• 7m -5 = 7m +7 . . . . . . never true
• -3y +3 = -3y -6 . . . . . . never true
• -2v +6 = -2v -6 . . . . . . never true