Автор - Lominadik

1) 45-6x+7x=68
2)5x+(4x-23)=67
3)(x-13)4=4
4)34+(x+12)=79
5)(5+x)3=90
6)16+4x=19+3x

Ответ

Автор - inessa11070000
1).-6x+7x=68-45
x=23
2).5x+4x-23=67
9x=67+23
9x=90
x=90:9
x=10
3).4x-52=4
4x=4+52
4x=56
x=56:4
x=14
4).34+x+12=79
46+x=79
x=79-46
x=33
5).15+3x=90
3x=90-15
3x=75
x=75:3
x=25
6).4x-3x=19-16
x=3

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