Odpowiedź :
Czołem!
2x - 54 = 4x + 2
2x - 4x = 2 + 54
-2x = 56 | : (-2)
x = -28
3x + 10 = 45
3x = 45 - 10
3x = 35 | : 3
x = 11 i 2/3
30 - 2x = 4x + 50
-2x - 4x = 50 - 30
-6x = 20 | : (-6)
x = -3 i 1/3
A) 2x-54=4x+2
2x-4x=2+54
-2x=56 |:(-2)
x=28
b) 45= 3x+10 |-10
3x=35 |3
x= 11 2⁄3
c) 30-2x= 4x+50
-2x-4x=50-30
-6x= 20 |:(-6)
x=-3 1⁄3