book Maths Puzzle Numerical Ability

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Wrtie as the sum or difference of single logarithms of x, y, and z

log(lowercase)8{(3x 3sqrt y) / z^5}

Note: the 3 is inside the

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book Other Question

Solve for the equation 5/2t= -3/5 I get 2=t is this true? Solve the following system by substitution
8x-4=16
y=2x-4