a) -4x + 7 = 19
-4x = 12
x = -3
b) 0,1x - 0,3 = -0,7 | *10
1x - 3 = -7
x = -7 + 3
x = -4
c) 3x - 5 + x + 2 = 15
3x + x = 15 + 5 - 2
4x = 18
x = 4 1/2
d) 4(x + 2) = -8
4x + 8 = -8
4x = -16
x = -4
e) 2(x + 3) + 5x = 2x – 4
2x + 6 + 5x = 2x - 4
2x + 5x - 2x = -4 - 6
5x = -10
x = -2
f) wkrótce
