Odpowiedź:
5x + 7 = x - 3
4x = -10
x = -2,5
7 - 2x = 9 - 3x
x = 2
8x + 5 = 7 - x
9x = 2
x = [tex]\frac{2}{9}[/tex]
1)
5x - x = -3 - 7
4x = -10 /:4
2)
-2x + 3x = 9 - 7
3)
8x + x = 7 - 5
9x = 2 /:9
x = 2/9
