book Maths Puzzle Numerical Ability

using -1 as a factor (divide)

8y+5
_______ =
10-16y



thanx

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book Other Question

Factor
12x4</sup>y3</sup> + 16x3</sup>y3</sup> - 20x3</sup>y4</sup>
______
Ö</font>x² + 5 - x - 2 = 0
_____
x = 1 + 6Ö</font>x - 9</PRE>