exam Maths Puzzle Numerical Ability

X^2-8X+12/X^2-36
X-2 / X+6

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exam Other Question

Sorry I cant seem to figure this out
SOLVE FOR X

0.4x+0.24(x-5)=0.08

THANKS ALOT, VERY MUCH APPRECIATED How many liters of a 40% acid solution and a 55% acid solution must be mixed to produce 60 liters of a 45% acid solution?
Write 2 equations and solve using substitution or elimination?
Not out of a text book!