Question

2m+n=7
4m+3n=-10
Solve using substitution method

Answer 1

m=31/2, n=-24. (31/2, -24).

Explanation:

2m+n=7

4m+3n=-10

-------------------

n=7-2m

4m+3(7-2m)=-10

4m+21-6m=-10

-2m=-10-21

-2m=-31

2m=31

m=31/2

2(31/2)+n=7

31+n=7

n=7-31

n=-24