SOLUTION: Solve the following system by the substitution method. 7x - y= -1 y= 14x+5

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Question 359037: Solve the following system by the substitution method.
7x - y= -1
y= 14x+5
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.7x+-+y=+-1
2.y=+14x%2B5
Substitute eq. 2 into eq. 1,
7x-%2814x%2B5%29=-1
7x-14x-5=-1
-7x=4
highlight%28x=-4%2F7%29
Then from eq. 2,
y=14%28-4%2F7%29%2B5
y=-8%2B5
highlight%28y=-3%29