Assume that x = monthly salary
x -1/3x - 1/7x = 1320
11/21x =1320
x = 1320 divides by 11/21
x = $ 2520
his monthly salary was $ 2520
Their sum can be greater than 1 but it would be less than 2.
The biggest fraction which is less than 1 is 0.99
Sum of 0.99 + 0.99 = 1.98, which is greater than 1 but less than 2.
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