exam Maths Puzzle Numerical Ability

Solve for y: y-4y^1/2-5=0

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exam Other Question

A rectangle is twice as long as it is wide. if its length is increased by 6in and its width is incresed by 2in, its area is increased by 32in squared. find the original dimensions. Solve each of the following systems by substitution.
McGraw Hill 6th edition, 8.3 # 28.
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4x-12y=5
-x+3y=-1