Question

Is -2 a solution of the linear equations $4x-2=8$ and $2x=-4$ ?

• A. -2 satisfies only 4x-2=8
• B. -2 satisfies only 2x = -4
• C. -2 satisfies both 4x-2=8 and 2x = -4.
• D. x= -2 doesn't satisfy either of the equations

Answer 1

The correct option is B

-2 satisfies only 2x = -4

Putting x= -2 in the two equations:

4x - 2 = 8:
LHS = 4 x -2 - 2 = -6 $\ne$ = RHS

2x = 4:
LHS = 2 x -2 = -4 = RHS

Hence, the solution x = -2 satisfies only 2x = -4