exam Maths Puzzle Numerical Ability

rewrtie each equation as a function of x

-3x+4y-11

Please help me to do this

thanks

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exam Other Question

Factor the following expression:

a^2(b - c) - 16b^2(b - c) The section is adding/subtracting radicals. My problem is subtracting.
The equation is: The sqaure root of 120 - The square root of 270 - The square root of 300. Can you help me?