iv) If 3x+2y=10 and 2x+3y=15, find the value of x+y.
Answers
Answered by
2
Solution:-
Now using substitution method
So Take (i) eq
Now substitute the (iii)eq on (ii)eq
Now put the value of y on (iii)eq
So value of x = 0 and y = 5
we have to find x + y
=> 0 + 5 = 5
Answer = 5
Answered by
26
3x + 2y = 10. _____. eq 1
2x + 3y = 15 ______. eq 2
Myltiply eq 1 with 2
Multiply eq 2 with 3
6x + 4y = 20
6x + 9y = 45. Subtract eq 1 and eq 2
___________
-5y = - 25
y = 5
Sub in eq 1
3x + 10 = 10
3x = 0
x=0
So, x + y = 0+ 5 = 5
Similar questions