Step-by-step explanation:
first of all we have to turn the "y" into a negative number so we multiply it by a negative number
11x+5y = 9..........................(1) × -3
11x+3y = 1.......................(2) × 5
and then we add the new equations
-33x - 15y = -27................(3)
55x+ 15y = 5........................(4)
eventually the y will be a "0" which has no value so it's pointless
22x = -22
x = -1
and then substitute y
11x +5y = 9
(11×-1) +5y =9
-11 +5y = 9
5y = 9 +11
5y = 20
y = 20÷5
y = 4
