SOLUTION: 5a + 12b = 120 30a + 8b = 800 a> =0 b> =0

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Question 141427: 5a + 12b = 120
30a + 8b = 800
a> =0
b> =0
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
5a + 12b = 120
5a=-12b+120
a=-12b/5+120/5
a=-12b/5+24 (red Line)
30a + 8b = 800
30a=-8b+800
a=-8b/30+800/30
a=-4b/15+80/3 (green line)
+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+30%2C+-12x%2F5+%2B24+%2C+-4x%2F15+%2B80%2F3%29+ (graph 300x200 pixels, x from -6 to 5, y from -10 to 30, of TWO functions -12x/5 +24 and -8x/15 +80/3).
NO POSITIVE ANSWER FOR BOTH A & B.