SOLUTION: Given 3x + y = 17 and x + 3y = -1. Find the value of 3x + 3y

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Question 626740: Given 3x + y = 17 and x + 3y = -1. Find the value of 3x + 3y
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
3x + y = 17
x + 3y = -1
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4x+4y = 16


4x+4y = 16

4(x+y) = 16

x+y = 16/4

x+y = 4

3(x+y) = 3*4

3x+3y = 12



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