Предмет: Алгебра, автор: mikhailnagorny

-2 2/3+2 1/3x(-15 3/7-(-4.8)) : 4/15=

Ответы

Автор ответа: zara381

1) 2x-5x=13-7
-3x=6
x=-2
2) 3x-23=19-4x
3x+4x=19+23
7x=42
x=6
3) 1.3x+4.8=2.9x-7.2
1.3x-2.9x=-7.2-4.8
-1.6x=2.4
x=-1.5
4) 47x+1 37=67x-5 57
47x-67x=-5 57-1 37
x=-6 27 : (-27)
x=6
5) 2(x-3)-4(x+1)= 5x-38
2x-6-4x+4=5x-38
2x-4x-5x=-38+6-4
-7x=-36
x=5.1
6)5/9x+17/9=2/9x+7/9
59x-29x=79-179
39x=-109
x= -109 : 39
x= - 3 19

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