exam Maths Puzzle Numerical Ability

Find two consecutive intergers such that the sum of 2 times the first interger and 4 times the second interger is 46.

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exam Other Question

(2x+5)/(x^2+8x+15)-(x+2)/(x^2+8x+15) How would I solve this system by addition:


5x - 4y = -5, x - 2y = -7