Problema Solution
Twice the sum of a number and 7 is equal to three time the difference of the number and 3. Find the number.
Answer provided by our tutors
we take "the difference of the number and 3" to mean "n-3" rather than "3-n"
let 'n' represent the number, then:
2(n+7) = 3(n-3)
solving for 'n' we have:
n=23
the number is 23