Problem 621

Solve by the substitution method

 

x + y= 5………(1)

-3x+y= -11………….(2)

 

Solution:- 

 

Put the value of y from equations 1 to equation 2

-3x+5-x=-11

-4x=-11-5

4x=16

X=4

Put this value in equation 1

4+y=5

Y=1