M.C.Q
If 17x + 23y = 40 and 23x + 17y = 80 then x + y = _________.
(i) 120 (ii) 40 (iii) 3 (iv) 80
Answers
Answered by
1
Answer:
solve by eliminating method please follow me and thank me
Answered by
2
23x + 17y = 80 - (1)
17x + 23y=40 -(2)
When 1 and 2 are added
40x + 40y = 120
40(x+y)=120
x+y=120/40
x+y=3
Therefore ,
Option (iii) is right
17x + 23y=40 -(2)
When 1 and 2 are added
40x + 40y = 120
40(x+y)=120
x+y=120/40
x+y=3
Therefore ,
Option (iii) is right
Similar questions