Verified answer

1) - 4 + х = 12

x = 12 + 4; x = 16

2) - 4 – х = - 12

-x = -12 + 4; -x = -8 /* (-1); x = 8

3) х – 4 = - 12

x = -12 + 4; x = -8

4) 4х = - 12

x = -12/4; x = -3

5) - 4 : х = 12 /*x

-4 = 12x; x = -4/12; x = -1/3

6) х : (-4) = -12 /* (-4)

x = 3

7) 0,5х = - 0,3

x = -0,3/0,5; x = -0,6

8) −58х= 1516

x = 1516/(-58) ; x = [tex]-26\frac{4}{29}[/tex]

9) 12(х + 5) = - 24 / 12

x + 5 = -2; x = -2-5; x = -7

10) 3(6 – х) – 2(х – 5) = 63

18 - 3x - 2x - 10 = 63

-5x + 8 = 63

-5x = 63 - 8; -5x = 55; x = 55/(-5); x = -11

Объяснение:

1)

-4+х=12

х=12+4

х=16

2)

-4-х= -12

-х= -12+4

-х= -8

х=8

3)

х-4= -12

х= -12+4

х= -8

4)

4х= -12

х= -12:4

х= -3

5)

-4:х=12

х= -4:12

х= -4/12= -1/3

6)

х:(-4)= -12

х= -12×(-4)

х=48

7)

0,5х= -0,3

х= -0,3:0,5

х= -0,6

8)

-58х=1516

х=1516:(-58)

х= -1516/58= -758/29= -26 4/29

9)

12(х+5)= -24

12х+60= -24

12х= -24-60

12х= -84

х= -84:12

х= -7

10)

3(6-х)-2(х-5)=63

18-3х-2х+10=63

-5х+28=63

-5х=63-28

-5х=35

х=35:(-5)

х= -7