exam Maths Puzzle Numerical Ability

Solve the following system of equations

x+2y-6=z
3y-2z=7
4+3x=2y-5z

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exam Other Question

Which of the ordered pairs (6,3) and (4,13) and (4,3) are solutions for the equation;

5x+y=33 If f(x) = x(x + 3)(x - 1), use interval notation to give all values of x
where f(x) > 0.