SOLUTION: solve the system by substitution 3x-y=50 x= -3y
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Question 376395: solve the system by substitution 3x-y=50 x= -3y
Found 2 solutions by robertb, mananth:
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
Substituting the 2nd eqn into the 1st eqn, we get 3(-3y) - y = 50, or -9y - y = 50, or -10y = 50, or y = -5. Then x = -3*-5 = 15
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
3x-y=50 x= -3y
...
plug the value of x in first equation
..
3*(-3y)-y=50
..
-9y-y=50
-10y=50
y=-5
..
x = -3*-5
x=15
..
...
m.ananth@hotmail.ca
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