Answer:
h =( m - 10)/5
Explanation:
We were given the initial equation
m = 5h + 10, to calculate the total money she earns in dollar per hour work. So to prove the answer, she earns $15/hr according to the question because she earns $10 for mowing and $5 for taking.
Substituting $15 into m gives us
15 = 5h + 10
5h=15-10
5h= 5
h = 1
h is one hour, so this proves h =( m - 10)/5