exam Maths Puzzle Numerical Ability

please can you help with this problem 3 OVER 7 X PLUS 5OVER 9Y = 27 university of phoenix elementary and intermidiate algebra

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how do I solve the equation .04x + .16y = 60. Mary is running to school. She leaves home at 7:00 am trotting at a speed of 12 mph. Her little lamb leaves home at 7:15 am running after her at a speed of 17 mph. What time of the day will the lamb catch Mary? Round your answer to the nearest minute.