If you mean 42 ft by 60 ft then 42 times 60 = 2520 square feet
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x2 - 42x + 441 = (x - 21)2
−39x−6
5x - 42x + 5 = - 37 x +5
42x+35x-35x=42x it's leave 85 so it's change into a negative 42x-85 is the answer
If you mean: -2(3x-3) = 7x-2 then the value of x works out as 8/13