Two unknowns

Determine the numbers x and y so that half of the number x is 30% of the number, and 60% of y is 90.

Final Answer:

x =  90
y =  150

Step-by-step explanation:


x/2 = 30/100 y
60/100 y = 90

x/2 = 30/100·y
60/100·y = 90

50x-30y = 0
60y = 9000


y = 9000/60 = 150
x = 0+30y/50 = 0+30 · 150/50 = 90

x = 90
y = 150

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