Question

Which equation is an identity? (1 point)
7 – (9x + 3) = –9x – 4
6m – 5 = 7m + 5 – m
10p + 6 – p = 12p – 3(p – 2)
3y + 2 = 3y – 2

Answer 1

simplify each side of the equation
if left is same as right its an identity

Answer 2

I'll do the first one for you
7 – (9x + 3) = –9x – 4

7 - 9x - 3 = -9x - 4
-9x + 4 = -9x - 4

- not an identity

Answer 3

remember when you multiply by negatives:

- * + = - and - * - = +