Odpowiedź :
e) 2x+9=18 |-9
2x=9 |:2
x=4,5
f) 5x-6=4x
5x-4x=6
x=6
e) 2x + 9 = 18
2x = 18 - 9
2x = 9
x = 4,5
f) 5x - 6 = 4x
5x - 4x = 6
x = 6
e) 2x+9=18 |-9
2x=9 |:2
x=4,5
f) 5x-6=4x
5x-4x=6
x=6
e) 2x + 9 = 18
2x = 18 - 9
2x = 9
x = 4,5
f) 5x - 6 = 4x
5x - 4x = 6
x = 6