exam Maths Puzzle Numerical Ability

How would you solve this equation?

x(x+1/3)(2x-3)=0

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exam Other Question

four oranges and five apples cost $3.56.three oranges and four apples cost $2.76.find the cost of an orange and the cost of an apple. Okay!! Well I kind of get what is going on but I can't get passed a certain poit here is the question and what I have so far. Pleasle tell me what I am doing wrong and i need help