exam Maths Puzzle Numerical Ability

Another question:
Find the zero of the following function
f(x)=6x+3

Thank you,
Jass

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exam Other Question

Hello, I was wondering if you could help me with this problem.
4q+19=5/6q $10,000 in two mutual funds, one rose 6% in one year and one rose 9% in one year. It rose a total of $684 in one year. How much was invested in each mutual fund?