exam Maths Puzzle Numerical Ability

Can you please explain this to me?

Solve using the quadratic formula

3x^2 - 2x = 15x - 10

thank you
julie

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exam Other Question

what is -2 over 3a^2b plus 5 ab^2 simplified? graph each system of equations on the same set of axes.name the point of intersection -x=-3y-6 -4=2y-8x thanks so much