please help me and my friend need the answer

Answer:
20m-60 = 280
Step-by-step explanation:
1. Start off defineing a variable, let’s call it m for months.
2. We know that she saves 20$ every month, so we can just divide the total to find the number of months. But, she withdrew $60. We can add those back to get the total she saved. So we have
280 + 60 = 340
Then we can divide by 20:
340/20 = 17.
So the equation would be
20m - 60 = 280.
I hope this helps!