exam Maths Puzzle Numerical Ability

how do i solve 2x-6y= -12

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exam Other Question

How long would it take a runner to complete a 10km race if a pace of 6.5 min/mile were maintained? Draw l1 through (-4,0) and (0,6). What is the slope of any line parallel to l1? Draw l2 through the origin and parallel to l1.