SOLUTION: solve using the substitution method y = 2x - 5, 3x + y = 15

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Question 337616: solve using the substitution method y = 2x - 5, 3x + y = 15
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.y+=+2x+-5
2.3x+%2B+y+=+15
Substitute eq. 1 into eq. 2,
3x%2B%282x-5%29=15
5x-5=15
5x=20
highlight%28x=4%29
Then from eq. 1,
y=2%284%29-5
y=8-5
highlight%28y=3%29