betty has two summer jobs. she earns $4 per hour babysitting and $5 per hour gardening. in july, she worked 103 hours and earned $483. how many hours did she spend on each job?

Answer 1

Before I answer your question I will remind you that sentences and questions each begin with a capital letter; also a proper name, like Betty and July, also begin with capital letter. Good English is just as important as correct math!

G= hrs gardening and B = hrs baby sitting

4B + 5G = 483

B + G = 103

Multiply the 2nd equation by 4 and subtract if from the first to get:

G=71.

You solve it from here.