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How much 78 octane gas and 91 octane gas should be blended to make 13 gallons of 85 octane gas

How much 78 octane gas and 91 octane gas should be blended to make 13 gallons of 85 octane gas
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4 votes
How much 78 octane gas and 91 octane gas should be blended to make 13 gallons of 85 octane gas

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User Bensonius
by
9.2k points

2 Answers

2 votes
Simultaneous equations
x+y=13
78x+91y=85(13)
(x,y)=(6,7)
answered
User Sckott
by
7.9k points
3 votes
13 x 85 = 1105
78 + 91 = 169

169 / 1105 = 6.5
answered
User JafarKhQ
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7.4k points
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