Предмет: Математика, автор: Ваитек

0.4(x-9)-0.3(x+2)=0.7

Ответы

Автор ответа: VeraKraimer81

0,4(x-9)-0,3(x+2)=0,7
0,4x-3,6-0,3x-0,6=0,7
0,1x-4,2=0,7
0,1x=4,9
x=4,9:0,1=49

Автор ответа: Ваитек

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