So 1st they r saying that Stephen earns x dollars per week
And Micheal earns y dollars per week
Combining their earnings= x+y
Now, in a month we have 4.345 weeks
So, in a year(12 months) we have 52.143 weeks.. which we can round off and write it as 52 weeks
So the equation will be as follows->
52(x+y)
hope it helps!! if yes, mark me as the brainliest!! Xd! :D