Question

Help?!!!?!?!?!

Solve, using the substitution method.

m + n = 5
m – n = 3

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


Solve the given system, using the substitution method.

y = 3x – 7
6x – 2y = 12

Possible Answers:
(14, 12)
(12, 14)
There is no solution.
There are an infinite number of solutions.

Answer 1

First question: add 1st n 2nd equation together n solve for m. U can then calculate n :)

Answer 2

Second question: multiple 1st eqn by 2 then add to 2nd eqn; solve for x; then y.

Answer 3

hmm...I'm still lost..