Sophia babysits for $15 per hour. She mows lawns for $12 per hour. This weekend, Sophia babysits 4 more hours than she mows lawns.
She earns a total of $195. Write a system of equations that can be used
to find how many hours she worked at each job.
Let b be hours babysitting. Let m be hours mowing.
b=m+ 4
hours worked
15b + 12m = 195 total money earned (please help me with both parts)