exam Maths Puzzle Numerical Ability

Algebra 1
How do I solve this problem?

The sum of two numbers is more than 20, and one number is 4 more than the other number. What are the numbers?

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exam Other Question

Could you help me please

f(x)=4x-5 and g(x)=-3x+2, find f(g(-2))

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Given set A= (1,2,3) and set B= (2,3,4)

A. A and B are equal sets
B. A and B are equivalent sets
C. A and B are both equal and equivalent.
D. No of the above.