exam Maths Puzzle Numerical Ability

The length of a rectangle is 4 cm less than the length. The area is 80cm^2. Find the length and width.

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exam Other Question
Solve the system by graphing, addition and substitution methods. 3x + y = –1, 9x + 3y = –3 how do you get a=1 1/2+(39-1)2 1/4?