HELP!!

Solve each given equation and show your work. Tell whether each equation has one solution, an infinite
number of solutions, or no solution. Explain your answers.
(a)
2 4( 1) 2 4 x x x    
(b)
25 15 (3 10)     x x
(c)
4 2 2 5( ) x x x x x    
Answer: