exam Maths Puzzle Numerical Ability

solve equation a+4 over 2 equals a+4 over a

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exam Other Question

Graph f(x) = -2x + 4.

Thank you. 9x-4y=8
4y-9x=-8
consistant or inconsistant
dependant or independant

What is the solution of the system of equations
a. infinetly many solutions
b. a point
c. no solution