exam Maths Puzzle Numerical Ability

If
(2x+1)(x-5)
--------- = 0,then x=
x+3

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exam Other Question

Solve each system of linear equations by using substitution.

{3/5x-2y=5} All in one question
{x=4/5y+2} Solve the problem. A boat can go 33 mph in still water. It takes as long to go 300 miles upstream as it does to go downstream 360 miles. How fast is the current?