exam Maths Puzzle Numerical Ability

9) Four times the difference of a number and one is equal to six times the sum of the number and three. Find the
number.

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exam Other Question
x+2 over 5 > x-1 over 2 Let M=B^a and N=B^c. Show why log(base b)MN = log(base b)M + log(base b)N.