Question

solve the substitution method
8m+n=35
m-8n=45
answer needs to be in ordered pair

Answer 1

Okay, lets rewrite the second equation as m = 45 + 8n. Then we substitute this into the first equation to get 8(45 + 8n) + n = 35, or 360 + 65n = 35, or 65n = -325, or n = -5. Then we can use n = -5 to solve the second equation: m - 8*(-5) = 45, or m + 40 = 45, or m = 5.

Answer 2

In ordered pair form, your answer is (m,n) = (5,-5).

Answer 3

frm first eqn u get n = 35 -8m
putting this in second eqn u get
m -8(35-8m) = 45
m - 280 + 64m = 45
65m = 45 + 280
m = 325/65
m = 5

substitute m = m in first eqn
8(5) + n = 35
40 + n = 35
n = 35 - 40
n = -5

so m = 5 and n = -5