What must be added to (3X + 5Y- 4Z +XYZ) to get 5X-8Y ?
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Answer:
Step-by-step explanation:
3x=4y=5z = k
x= k/3 ,y= k/4, z= k/5
x : y: z = k/3:k/4: k/5 = 1/3 : 1/4: 1/5
x: y : z = 20 : 15 : 12
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