Odpowiedź :
1)
2x = 12 - 4x
2x + 4x = 12
6x = 12 /:6
x = 2
2)
3x + 8 = 7x - 4
3x - 7x = -4 - 8
-4x = -12 /:(-4)
x = 3
3)
4x + 7 + 5x = 6x + 12 + 2x
9x + 7 = 8x + 12
9x - 8x = 12 - 7
x = 5
1)
2x = 12 - 4x
2x + 4x = 12
6x = 12 /:6
x = 2
2)
3x + 8 = 7x - 4
3x - 7x = -4 - 8
-4x = -12 /:(-4)
x = 3
3)
4x + 7 + 5x = 6x + 12 + 2x
9x + 7 = 8x + 12
9x - 8x = 12 - 7
x = 5