Question

How to solve it by substitution method 3x- 5y =-1, x- y = -1?

Answer 1

Step-by-step explanation:

3x-5y=-1 .....1

x-y=-1 ....2

equation 2 ko 3 se multiply krne pr

3x-3y=-3 ...3

equation 1st -equation3 krne pr

(3x-5y)-(3x-3y) =-1-(-1)

-2y=0

y=0

and

y ki value equation 2 me rakhne pe

x=-1

Answer 2

Answer:

3x-5y=-1 (first equation)

x-y=-1. (second equation)

IN equation 2

x=-1+y (third equation )

putting value of x in eq 1

3(-1+y)-5y=-1

-3+3y-5y=-1

-2y=-1+3

-2y=2

y=2÷-2

y=-1

putting value of y in 3eq

x=-1+(-1)

x=0