exam Maths Puzzle Numerical Ability

i need help for these problems on solving rational equation

5e/3e + 1 – 1/9e+3 = 7/6

2/m+2 – m+2/m-2 = 7/3

1/z+1 - 6-z/6z = 0

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exam Other Question
The position of an object moving in a straight line is given by s=t^2-8t, where s is in feet and t is the time in seconds the object has been in motion. How long (to the nearest tenth) will it take the object to move 10 feet? (given) triangle ABC is isosceles; line CD is the altitude to base line AB
(to proove) line CD bisects angle ACB