exam Maths Puzzle Numerical Ability

solve the system
3x+4y=40
x-2y=0

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exam Other Question

Solve the open sentence and name and graph the solution set. Please and thank you, to I can have a clear understanding of what I am doing.

|3k+4|≥8 Complete the ordered pair ( ,4) so that it is the solution for x+2y=9.