Question

7m+2n=_8
2m=3n_13 solve using substitution method​

Answer 1

Answer:

n=3;m=-2

Explanation:

7m+2n=-8........equasion 1

3n-13=2m.... equation 2

now,from equasion 1: m=-2n-8/7(by substituting the value of m from equasion 1)

Now substituting the value of m in equasion 2

2(-2n-8/7)=3n-13

-4n-16/7=3n-13

-4n-16=(3n-13)*7

-4n-16=21n-91

-16+91=21n +4n

75=25n

therefore n=3

now for m:

n=3

7m+2*3=-8. (equasion 1)

7m+6=-8

7m=-8-6

7m=-14

m=-14/7

m=-2