Предмет: Математика, автор: Tosha0812

реши уравнение используя основное свойство пропорции
1) 0,4/х-3=0,9/х-5
2) 5х-1/9 = 6х+4/2

Ответы

Автор ответа: Marinka2105
0
1)0,9×(х-3)=0,4×(х-5)
0,9х-2,7=0,4х-2
0,9х-0,4х=2,7-2
0,5х=0,7
х=0,7÷0,5
х=1,4
второй не получается)
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