SOLUTION: 3x-y=-4 5x+9y=-28

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Question 1207628: 3x-y=-4
5x+9y=-28
Answer by MathLover1(20850) About Me  (Show Source):
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3x-y=-4..........eq.1
5x%2B9y=-28.....eq.2
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3x-y=-4..........eq.1, solve for y
3x%2B4=y..........eq.1a....substitute in eq.2

5x%2B9%283x%2B4%29=-28.....eq.2, solve for+x
5x%2B27x%2B36=-28
32x=-28-36
32x=-64
x=-64%2F32
x=-2
go to 3x%2B4=y..........eq.1a, substitute x
y=3%28-2%29%2B4
y=-6%2B4
y=-2

Solution:
x=-2
y=-2