exam Maths Puzzle Numerical Ability

kaylene is 30 yrs. old and jessica is 22 yrs. old. how many years ago was kaylene twice as old as jessica?

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exam Other Question

twice the greater of two consecutive odd integers is 13 less than three times the lesser. find the number

define a variable
write equation
solve

can you show me how to do this problem please?
complementary angles where one angle measures 75