Question

x=0 and the answer is -4 which is incorrect. how is a)9x-3x-4, b)12x-4, & 5x+x-4 not equal to -4

Answer 1

Given data

A. 9x - 3x - 4 = 6x - 4

B. 12x - 4

C. 5x + x - 4 = 6x - 4

For x = 0,

Each expression is equal to -4.

The three expressions are equivalent when x = 0, but not equivalent for any other values of x.

Brianna error

Expreesion 12x - 4 is not equivalent to expressions 9x - 3x - 4 and 5x + x - 4 for other values of x.

Hence, only expressions

9x - 3x - 4 is equivalent to 6x - 4

Hence only expressions A and C are equivalent.