1.
-8(3+x)+x=4
-24 - 8x + x = 4
-24 - 7x = 4
7x = -24-4
7x= -28
x=-28:7
x =-4
2.
-6=-9(7+x)+4x
-63 - x + 4x = -6
-63 + 3x = -6
3x = -6 + 63
3x = 57
x = 57:3
x = 19
3.
-8x+4(7+8x)=4x+7
-8x + 28 + 32x = 4x + 7
24x + 28 = 4x + 7
24x - 4x = 7 - 28
20x = -21
x = -21 : 20
x = -1,05
4.
-x+2(7-9x)=x-4
-x + 14 - 18x = x - 4
-19x + 14 = x - 4
x + 19x = 14 + 4
20x = 18
x = 18 : 20
x = 0,9
5.
-7x+9(2+x)=-4x+3
-7x + 18 + 9x = -4x + 3
2x + 18 = -4x + 3
2x + 4x = 3 - 18
6x = -15
x = -15 : 6
x = -2,5
6.
-x+4(7-x)=-7x+5
-x + 28 - 4x = -7x + 5
-5x + 28 = -7x + 5
7x - 5x = 5-28
2x = -23
x = -23 : 2
x = -11,5