exam Maths Puzzle Numerical Ability

In Algebra how do you solve this: -(2y+1)=8(y=2)-7

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exam Other Question

Your boat will go 15 miles per hour in still water. If you can go 12 miles downstream in the same amount of time it takes to go 9 miles upstream, then what is the speed of the current? please help! Thanks
Factor completely:
x2 – 5x – 14