Question

Two equations are given below:

m + 5n = 20
m = n − 4

What is the solution to the set of equations in the form (m, n)?
(3, 7) (0, 4) (5, 1) (2, 6)

Answer 1

rewrite the first equation as

m = 20 - 5n

now we have

m = 20 - 5n
m = n - 4

we can set these two equations equal to each other

20 - 5n = n - 4
solve for n

Answer 2

-6n=-24

Answer 3

n = { # }

Answer 4

-6n = -24

divide both sides by (-6), what do you get?