Question

plzz plzz solve this equation

Answer 1

I hope this answer would be helpful for you

Answer 2

=5k -3m =80. .......first equation
7k -5m =80.......second equation
Multiplying first equation by 5 and second equation by 3, we get:
5(5k-3m)=80*5
25k-15m=400..........third equation
and
3(7k-5m)=80
21k-15m=240........fourth equation25k
now, we subtract fourth from third equation:
25k-15m=400
21k-15m=240
- + -
.............................
4k. =160
k. = 40
putting the value of k in second equation,we get:

7*40-5m=80
280-5m=80
-5m=80-280
-5m=-200
5m=200
m= 200/5
m=40