Bob and Ann Expression
If we know that Bob is years old and Ann is years old, which of the following expressions describes the relationship between their ages if stands for Bob's age and stands for Ann's?
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1 solution
Bob = 20 Ann = 4
So Bob is with 16 years older than Ann. If you look to the answers you will see this 4a = b + 20, b = 4a + 20, a = b +16, b = a +16. Let on "b" put 20(his years) and on "a" put 4(her years).
4 * 6 = 20 + 20 =
24 = 40 - incorrect
20 = 4 * 4 + 20
20 = 16 + 20 - incorrect
4 = 20 + 16
4 = 36 - incorrect
20 = 4 +16
20 = 20 - correct
So the Correct answer is b = a + 1 6 .