Question

11x + 4y = 33 ; 4x + 11y = 12 find x+y=? *

Answer 1

Answer:

x + y = 3

Step-by-step explanation:

4x + 11y = 12 --------(1)

11x + 4y = 33 ------(2)

therefore,

4x + 11y = 12

x=  (12- 11y)/4

put the value of x in eq. 2

11[(12-11y)/4] + 4y = 33

(132 - 121y)/4 + 4y = 33

(132 - 121y + 16y)/4 = 33

132 - 105y = 33*4

105y = 132- 132

y = 0/105 = 0

x=  (12- 11y)/4

x= (12 - 11*0)/4 = 12/4 = 3

therefore , x + y = 3

Answer 2

Answer:

I hope this will help you