Вопрос школьника по предмету Математика
8+5,1x=49(1+0,1x)
38(0,1x+1)=40-3,2x
17x-2,6=3(0,8+3x)
помогите пожалуйста
Ответ учителя по предмету Математика
8+5,1x=49+4,9x
5,1x-4,9x=49-8
0,2x=41
X=41÷0,2
X=205
3,8x+38=40-3,2x
3,8x+3,2x=40-38
7x=2
X=2/7
17x-2,6=2,4+9x
17x-9x=2.4+2,6
8x=5
X=5/8
X=0,625
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