Answer: 24
Step-by-step explanation:
Since n is 5 you will multiply 9x5 which you’ll get 45 than you move on to 3m so m=7 so than you will multiply 3x7 which equals 21. The final step is just subtract the two numbers.
9x5 - 3x7= 45 - 21= 24
9x5= 45
3x7= 21
