exam Maths Puzzle Numerical Ability

Solve using sustitution method,answer presented as an ordered pair.
8x-24y=16
5x-10y=-5

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exam Other Question

Bob invested $19,000, part at 14% and part at 1%. If the total interest at the end of the year is $840, how much did he invest at 14%? Can someone help on this problem?

List the factors of the number 27.

Thanks,
Ashley