Вопрос школьника по предмету Математика
Найдите корень уравнения:1)0,6-1,6(х-4)=3(7-0,4х) 2)х-2/х-7=6/8 (во втором дроби)
Ответ учителя по предмету Математика
1)0,6-1,6(х-4)=3(7-0,4х)
0,6-1,6х+64=21-1,2х
-1,6х+1,2х=21-0,6-64
-0,4х=-43,6
х=109
второе не получается(
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