exam Maths Puzzle Numerical Ability

Solve the system of linear equations by the substitution method.
5x + 4 y = 14
15x � 2y = 7

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exam Other Question

a canoe can travel 15 mi/hr in still water. Going with the current, it can travel 20 miles in the same time that it takes to travel 10 miles against the current. Find the rate of the current when a smaller number is subtracted from a larger number, the difference is 34. if the larger number is 30 less than 3 times the smaller number, what are the two numbers?