i need help solving a system of linear equation by addition. 5y=5x-20 , 3y=3x-12

Question

5y=5x-20,3y=3x-12

Answer 1

1)  5*y = 5*x - 20      1st equation

 

to simplify, divide through each term by 5:

 

y = x - 4

 

2) 3*y = 3*x - 12

 

again, simplify, divide through each term by 3:

 

y = x - 4

 

You only have 1 independent equation with 2 unknowns; in other words there is not a unique solution