exam Maths Puzzle Numerical Ability

Find values for m and b in the following system so that the solution to the system
is (-3, 4).
5x + 7y = b
mx + y = 22

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exam Other Question

Victor owned 5/6 of a family business.

He sold 2/7

of the busniess to his daughter.

What
portion of the business does he still own?
solve by using the quadratic formula
4x^2-3x+3=0