I really need help I am giving 50 points for this. Simplify each given equation and show your work. Tell whether it has one solution, an infinite number of solutions, or no solutions, and identify each equation as an identity, a contradiction, or neither.

a) 7x+9=3x+7+4x-15
Select One:
One solution | an infinite number of solutions | no solution
Select One:
Identity | Contradiction | Neither
b) 8x+5x-7=21+12x
Select One:
One solution | an infinite number of solutions | no solution
Select One:
Identity | Contradiction | Neither
c) 24-3x=8-2x+16-x

Select One:
One solution | an infinite number of solutions | no solution
Select One:
Identity | Contradiction | Neither
Please help, and please show your work!