exam Maths Puzzle Numerical Ability

16 2(x-4)
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x2-16 x+4

Adding Rational Expressions

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exam Other Question

How many gallons of a 60 percent acid solution must be mixed with 80 gallons of a 14 percent solution to obtain a solution that is 50 percent acid? divide and simplify

x-7 (x+5)(x-7)
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9(2x-1) 6x(x+5)