book Maths Puzzle Numerical Ability

solve
e^3x+1)^2/e^4=e^10x

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book Other Question

solve for x. (answer I got was either Xsquared-2x-6x+12 or zero?)


...____4____...= 1 -..._1_
.... X2+8X+12........... X+6
{{{x/3=5/8-2x/4}}}