exam Maths Puzzle Numerical Ability

Solve by the substitution mehtod

3x+5y=-11
-6x+y=44

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exam Other Question

please show me step by step how this one is solved

1/x-2 = 3/x-3 A boat travels 65 miles downstream in 5 hours and 15 miles upstream in 3 hours. Fin the ordered pair that tells the speed of the boat, (b) and the speed of the current, (c)