exam Maths Puzzle Numerical Ability

I will try to write this correctly -

5^x-1 = 125^2x+3 ( the x-1 and 2x+3 should all be in superscript and raised)
HELP
need to solve

thank
lucy

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exam Other Question

Write the equation of the line L satisfing the given geometric conditions.
L has y-intercept (0,-3) and is parrallel to the line with equation
y=2/3x+1 x/6 - x/8 = 1 In this problem I have to solve and check for x. I tried the following:
x/6 4/24
-
x/8 3/24

1/24
Is this correct or did I do something wrong?