Question

Which equation doesn't belong? Explain your reasoning?

A. 4(x+3)=9
B. 4 ⋅ x + 12 = 9
C. 4 + 3x = 9
D. 9 = 12 + 4x

Answer 1

C

Explanation:

A - Once the equation is simplified it is 4x + 12 =9

B - The equation simplifies to 4x + 12 = 9, this means that 4x + 12 =9 is the standard equation.

C - This equation is not like the other equations and does not have the same value.

D - Is the same equation but backwards

The answer to the standard equation is x = - 0.75 while the other equation is x = 1.6 repeating