Question

I need help with substitution. 2m + n = 1
m - n = 8

Answer 1

ok, find/isolate m from 2nd equation.
m-n=8
add n on both sides, what you get ?

Answer 2

m = 8 + n?

Answer 3

thats correct!
now substitute that in 1st equation,
what u get ?

Answer 4

2(8 + n ) + n = 1?

Answer 5

yes, now distribute 2 ,
2(8+n) =.. ?

Answer 6

16 + 2n + n = 1 :3

Answer 7

going good :)
now 2n+n =...?
also subtract 16 on both sides.

Answer 8

16 + 3n = 1. Then subtract 16?

Answer 9

yes!

Answer 10

n = -5?

Answer 11

good!
its correct :)

Answer 12

m = 3?

Answer 13

correct!

Answer 14

The solution is going to be (3,-5) right?

Answer 15

yes, thats right.

Answer 16

Mkaii. :3 i have another question but i'll make a new post. c:

Answer 17

okay :)