substitution method
posted by upbeat on .
solve by the substitution method
2m+n=9
m6n=50
the solution is (___,___)

1. 2m + n = 9
m  6n = 50
Using Eq.1, solve for n:
n = 9  2m
Substitute 9  2m for n in Eq. 2:
m 6(9 2m) = 50
Solve for m:
m  54 + 12m = 50
m = 8
Substitute 8 for m in Eq. 1:
2(8) + n = 9
n = 7.
Solution: m = 8, and n = 7. 
x=84y,3x+5y=3