exam Maths Puzzle Numerical Ability

hi, i need some help solving this equation and if possible expressing my answer as an ordered pair
x-5/3y=7
4/7x+y= -13/7

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exam Other Question
Find the domain of x-2y=1 if the range is (-2,0,5,8,) Multiply:
(√[3] + 2√[5])(6√[3] - √[5])

?????