Question 146527
The sum of three numbers is 14.
x + y + z = 14
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The largest is 4 times the smallest
x - 4z = 0
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while the sum of the smallest and twice the largest is 18
2x + z = 18
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. Use a linear system in three variables to find the three numbers. 
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x + y + z = 14
x + 0 -4z = 0
2x+ 0 + z = 18
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Solve by any method to get:
x = 8
y = 4
z = 2

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Cheers,
Stan H.