HELP ME OUT PLEASE SOLVE IT..............

Question

Solved the system by substitution.if the system is inconsistent and has no solution,state this .if the system is dependent,write the form of the solution for any real number x.
x+y=50
0.25x+0.75y=0.60(50)

Answer 1

Multiply the bottom equation by 4 and you get:

 

x + 3y = 120

 

Subtract this equation from the first equation up top & we get:

 

-2y = -70

 

  y = 35

 

  x = 50 - 35 = 15