book Maths Puzzle Numerical Ability

-18x=-45

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book Other Question

two cyclists starts from the same point and ride in opposite directions. onecyclist rides 5 mph faster than the other. in 5 hour the cyclists are 175 miles aparT. find the rate of the slower cyclist. (3x-2)(4x exponent3 - 2x exponent3 -2x +7x-5)