Truck driver, Mr. Sanford, drives semi-trailer trucks for A-1 Fleet Company. He generally drives 8 hours per day and works 5 days per week. His truck has a gas tank that holds 210 gallons of gasoline.

step-by-step explanation:

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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.