Question

What is the value of 'x' in 4x - 7y = 9 if y = 3?
How many subsets does a set of three distinct elements have​

Answer 1

1) 4x - 21 =9

4x = 30

x = 7.5

2) A set with n elements has 2^n subsets.

Therefore a set with 3 elements will have

2³ = 8 subsets

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