exam Maths Puzzle Numerical Ability

solve by addition method: 3/7x + 5/9y = 27

1/9 x + 2/7y = 7

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exam Other Question

At exactly what time (to the fraction of a minute) between 7:00 and 8:00 do the hands of a clock form a straight angle? determine the equation of each line. Write the answer in standard form using only integers as the coefficients.

The line through (-2,0) with slope -3/4. (the negative sign next to the 3/4 is in the middle of the 3 and 4 next to the divide line)