substitution method
posted by Lorri .
I am burned out on math or just confused.
3x + 7y=10
x= 22y
A. Solution is an ordered pair
B. No solution

substitution method 
Reiny
this one is easy, just plug the second equation into the first
3x + 7y = 10
3(22y) + 7y = 10
6  6y + 7y = 10
y = 4
now back into x = 2  2y
x = 2  8 = 6
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