Question

Solve, using the substitution method.

m + n = 5
m – n = 3

(Points : 1)
There is no solution.
The solution is (2, –1)
The solution is (4, 1)
There are an infinite number of solutions.

Answer 1

(4,1)

Answer 2

m + n = 5 --> m = 5 - n
now sub 5 - n in for m
m - n = 3
5 - n - n = 3
5 - 2n = 3
-2n = 3 - 5
-2n = -2
n = 1
now sub 1 in for n in either of the original equations to find m
m + n = 5
m + 1 = 5
m = 5 - 1
m = 4
solution is : m = 4 and n = 1

Answer 3

thank u for explaining @kelliegirl33

Answer 4

no problem :)