Odpowiedź:
a) 3x + 7 = 2x + 1
3x - 2x = 1 - 7
x = -6
b) x = 8 - 3x
x + 3x = 8
4x = 8
x = 2
c) 2x - 4 = 4x - 2
2x - 4x = -2 + 4
-2x = 2
x = -1
d) 7 - 2x = 5x + 28
-2x - 5x = 28 -7
-7x = 21
x = -3
e) 8x - 5 = 9x - 5
8x - 9x = -5 + 5
-x = 0
x = 0
f) 6x + 2x - 10 = 3x + 5
8x - 3x = 5 + 10
5x = 15
x = 3
g) x + 2x + 3x = 5 + 6 + 7
6x = 18
x = 3
h) 4x - 1 + 5x = 6x + 1 - 7x
9x - 6x + 7x = 1 + 1
10x = 2
x = [tex]\frac{2}{10}[/tex] = [tex]\frac{1}{5}[/tex] = 0,2
i) 0 = 4x - 4 + 5x - 5
-4x - 5x = -4 - 5
-9x = -9
x = 1
