Question
I am burned out on math or just confused.
3x + 7y=10
x= 2-2y
A. Solution is an ordered pair
B. No solution
3x + 7y=10
x= 2-2y
A. Solution is an ordered pair
B. No solution
Answers
Reiny
this one is easy, just plug the second equation into the first
3x + 7y = 10
3(2-2y) + 7y = 10
6 - 6y + 7y = 10
y = 4
now back into x = 2 - 2y
x = 2 - 8 = -6
3x + 7y = 10
3(2-2y) + 7y = 10
6 - 6y + 7y = 10
y = 4
now back into x = 2 - 2y
x = 2 - 8 = -6