exam Maths Puzzle Numerical Ability

43. Solve. 5x - 0.78 = 4(x - 0.09)
A) 0.56
B) 0.42
C) 0.21
D) 0.76
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exam Other Question

The speed of a passenger train is 14 mph faster than the speed of a feight train. The passenger train travels 400 mi in the same time that it takes the freight train to travel 330 mi. Find the speed of each train. If f(x)= x/x-3, find f(0)