Twice the difference between a number, n, and forty-two is three times the number.
Twice: Multiplied by 2
Difference between a number, n, and forty-two: N minus 42
is: Equal sign (=)
three times the number: 3 multipled by n
2 * (n-42) = 3n
2n - 84 = 3n Distribute the 2 to the n and -42
n = -84 Subtract 2n from both sides, and this will be your answer.