exam Maths Puzzle Numerical Ability

Solve for 'x':
a) x=logbase6 9 +logbase6 8- logbase6 2
b) x=logbase8 sqrt80- logbase8 sqrt5

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exam Other Question

1/a - 3 - 1/a + 3 + 2a/a^2 - 9 a girl has 24 quarters and dimes. togther they had up to 3.60 how many quarters does she have?