Question

m + 3n = 10
m = n − 2

Answer 1

Use substituion
M value is given
so we plug equation 2 into equation 1
\[\huge~\rm~n-2+3n=10\]
from here solve for n

Answer 2

N=4

Answer 3

N=3

Answer 4

n-2+3n = 10
add like terms.
n+3n-2 = 10
Move -2 to the other side.
4n-2+2 = 10+2
4n = 12
4n/4 = 12/4
n = 3