3) (x+y= 32, х- у=14; 1247. Найдите решение системы уравнений: x+y=14, (х - у = 7, 1) 2) x - y = 8; x+y = 23; х – у = 9, (2x+y=11, 5) х+у= 29; 3х – у = 4; - 4) 6) 3х – у = 5, 4x + y = 9. СРОЧНО ДАМ 30 БАЛЛОВ!!!!!​
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