Вопрос школьника по предмету Математика
х+2у=11
9х+15у=16 теңдеулер жүйесін алмастыру арқылы шешіңіздер?
Ответ учителя по предмету Математика
Ответ:
x= -44*1/3
y=83/3 = 27*2/3
Пошаговое объяснение:
x = 11-2y;
9(11-2y)+15y=16
99-18y+15y=16
-3y=-83
y=83/3
x=11-2*(83/3) = 11 — 166/3 = 11 — 55*1/3= -44*1/3
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