please write 2 linear equations of the two word problems

1. Cynthia has $200 in her savings account and spends $3 per day on coffee.
2.James increases his muscle mass by 3 kg per day.

1. Let x represent the number of days Cynthia spends on coffee. The equation representing the amount of money she has left in her savings after x days is:

200 - 3x = amount of money left in savings

2. Let y represent the number of days James has been increasing his muscle mass. The equation representing the increase in his muscle mass after y days is:
3y = increase in muscle mass (in kg)