Odpowiedź:
a)
1/2x - 7 = (x - 36)/6 | * 6
3x - 42 = x - 36
3x - x = - 36 + 42
2x = 6
x = 6/2 = 3
W przypadku , gdyby równanie miało postać :
1/2x - 7 = x - 36/6
1/2x - 7 = x - 6 | * 2
x - 14 = 2x - 12
x - 2x = - 12 + 14
- x = 2
x = - 2
b)
1/2(x + 1) = 1 | * 2
x + 1 = 2
x = 2 - 1 = 1
c)
3(x - 3) = 2x + 11
3x - 9 = 2x + 11
3x - 2x = 11 + 9
x = 20
