41, 50, 59
all you have to do is subtract the first number from the second number which is 9. then you add 9 to the last number to get your answer
The answer would be 15m + 2n.
1. Gather like terms (8m + 7m) + (4n - 2n)
2. Simplify (15m + 2n)
207054 minus 206343 is 711