Question

{（m+n/2)+(m-2/3)=6,4(m+n)-5(m-n)=2 用加减消元法解二元一次方程急求解答谢谢!

Answer 1

{（m+n/2)+(m-2/3)=6

3(m+n)+2(m-2)=36

3m+3n+2m-4=36

5m+3n=40 (1)

,4(m+n)-5(m-n)=2

,4m+4n-5m+5n=2

-m+9n=2

m=9n-2 (2)

5(9n-2)+3n=40

45n-10+3n=40

48n=50

n=25/24

m=59/8