Question

(х+у=7)
(3х+2у=16)
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Answer 1

$(x + y = 7 div 2 \ 3x + 2y = 16) \ \ \ - (2x + 2y = 14 \ 3x + 2y = 16) \ \ \ - x = - 2 \ x = 2 \ \ \ \ 2 + y = 7 \ y = 5$

ответ х =2 ;у =5