exam Maths Puzzle Numerical Ability

3y = 4x =0

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exam Other Question

how do i work this out??
A bus leaves a station at 1 P.M., traveling west at an average
rate of 44 mi/h. One hour later a second bus leaves the same station, traveling
east at a rate of 48 mi/h. At what time will the two buses be 274 mi apart? GRAPH THE INEQUALITY

y>-2