Odpowiedź:
e) x=4
f) x=8
g) x=3
h) x=20
e) x=2
f) x= -1
g) x=1
h) x=4
Szczegółowe wyjaśnienie:
e)
2x - 3 + x = 9
3x = 9 + 3 /:3
x = 12/3 = 4
f)
3x - 5 - x = 11
2x = 11 + 5 /:2
x = 16/2 = 8
g)
x - 5 + 6x = 16
7x = 16 + 5 /:7
x = 21/7 = 3
h)
3x - 4 - 2x = 16
x = 16 + 4 = 20
9x = 3x + 12
9x - 3x = 12
6x = 12 /:6
x = 2
10x = 4x - 6
10x + 4x = -6
14x = -6 /:14
x = -6/14 = -3/7
3x = 9 - 6x
3x + 6x = 9
9x = 9
x = 1
5x = 4x + 4
5x - 4x = 4
x = 4
