Marty started a lawn mowing business. he kept track of his expenses and earnings in a table.
description amount $
lawn mower -49.99
gasoline -8.79
moyer's yard 40
griffen's yard 35.50

how much money did marty make?

enter your answer in the box.

%40

step-by-step explanation:

your answer is -9

step-by-step explanation:

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.