Odpowiedź:
a)
8 - 2x = 4x - 4
-2x - 4x = -4 - 8
-6x = -12 /: (-6)
x=2
b)
7 - 3x = -8 - 8x
-3x + 8x = -8 - 7
5x = -15 /:5
x= -3
c)
11x - 9 = 7x - 5
11x - 7x =-5 + 9
4x = 4 /;4
x = 1
d)
5x + 7 = 6x + 11
5x - 6x = 11 - 7
-x = 4 /*(-1)
x = -4
e)
-6 - 2x = 4x + 6
-2x - 4x = 6 + 6
-6x = 12 /:(-6)
x =-2
f)
4x + 10 = 16 - 2x
4x + 2x = 16 - 10
6x = 6 /:6
g)
6x - 7 = 2x + 9
6x - 2x = 9 + 7
4x = 16 /:4
x = 4
h)
3x + 8 = 7x - 4
3x - 7x = -4 - 8
-4x = -12 /:(-4)
x = 3
i)
7 - 5x = 4 - 8x
-5x + 8x = 4 - 7
3x = -3 /:3
x = -1
Szczegółowe wyjaśnienie:
