book Maths Puzzle Numerical Ability

Simplify and evaluate (x3y-4z0/5x6y8)3

Thanks for any help you can give, i could not figure this out :)

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book Other Question

Please answer this one please Linda has some dimes nickels and quarters in her purse. The total value of these coins is $2.55. She has three times as many dimes as quaters. She has three more nickels than quarters Please help me solve this equation: (((x^3+x-1=0)))