exam Maths Puzzle Numerical Ability

1. 3n=(6-n)(-3)

2. -10= 4- 7x/4

3. 1/4(y+8)=5

4 7.6x + 3.7= 2.8-1.6x

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exam Other Question

find the slope of the passing through the following points:
(2, 0) and (0, -4)

A. 2
B. -2
C. 1/2
D. -1/2

Thank you for any help...
How do you DIVIDE this rational expression: 5x-5/16(division sign)x-1/6?Whats the answer?