exam Maths Puzzle Numerical Ability

Find x:y:z, if 2x+y-5z = 0 and 3x-2y-4z=0
a)1:2:1 b)1:1:1 c)1:1:2 d)2:1:1

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exam Other Question

Solve 4e^-x = 9 Solve each system by the substitution method. determine whether the equstions are independent, dependent, or inconsistent.

x-y=5
2x=2y+14