Odpowiedź :
Odpowiedź:
a)
4x + 5 = 2x - 3
2x + 5 = -3
2x = -8
x = -4
b)
6x = -2
x = -1/3
c)
1/3x = 5
x = 15
d)
2x - 4 = 3x - 8
2x + 4 = 3x
4 = x
x = 4
e)
2x = 8 - 6x
8x = 8
x = 1
f)
-(4+x) = 2(3-x)
-4 - x = 6 - 2x
-x = 10 - 2x
0 = 10 - x
x = 10
g)
x - 7 - 2(3x + 5) = 3
x - 7 - 6x - 10 = 3
-5x - 17 = 3
-5x = 20
0 = 5x + 20
-20 = 5x
5x = -20
x = -4