Question

3x + y = 13 , 3y – x = 9​

Answer 1

Answer:

x = 3 , y = 4

Step-by-step explanation:

3x+y = 13 ---(1)

-x+3y = 9 ---(2)

(1) ---> 3x+y = 13

(2)*3 ---> -3x+9y = 27

cancel it ---> 10y = 40

y = 4

sub y value into (1) --> 3x + 4 = 13

3x = 9

x = 3