a) 3x + 8 - 2x = 11 + 4x
3x - 2x - 4x = 11 - 8
-3x = 3/:(-3)
x = -1
b) 13 - 3(6 - x) - 4 = x + 8
13 - 18 + 3x - 4 = x + 8
3x - x = 8 - 13 + 18 + 4
2x = 17 /:2
x = 8,5
c) 3 - (4x - 5) + 3x = 11 - x
3 - 4x + 5 + 3x = 11 - x
-4x + 3x + x = 11 - 3 - 5
0 ≠ 3
równanie sprzeczne
d) 7x - 5 = 2x - 20
7x - 2x = -20 + 5
5x = -15 /:5
x = -3
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a) 3x + 8 - 2x = 11 + 4x
3x - 2x - 4x = 11 - 8
-3x = 3/:(-3)
x = -1
b) 13 - 3(6 - x) - 4 = x + 8
13 - 18 + 3x - 4 = x + 8
3x - x = 8 - 13 + 18 + 4
2x = 17 /:2
x = 8,5
c) 3 - (4x - 5) + 3x = 11 - x
3 - 4x + 5 + 3x = 11 - x
-4x + 3x + x = 11 - 3 - 5
0 ≠ 3
równanie sprzeczne
d) 7x - 5 = 2x - 20
7x - 2x = -20 + 5
5x = -15 /:5
x = -3