a) 9x = 8 + 5x
9x - 5x = 8
4x = 8 /:4
x = 2
b) 3+ 7x = 2x - 12
7x - 2x = -12 - 3
5x = -15 /:5
x = -3
c) 2x - ( 4x - 4) = 3( 8 - 2x )
2x - 4x + 4 = 24 - 6x
-2x + 4 = 24 - 6x
-2x + 6x = 24 - 4
4x = 20 /:4
x = 5
Odpowiedź:
a) 9x = 8 + 5x
9x-5x=8
4x=8 /4
x = 2
b) 3 + 7x = 2x - 12
7x - 2x = -12 - 3
5x = -15 / 5
x = -3
c) 2x - (4x - 4) = 3 (8 - 2x)
2x - 4x + 4 = 24 - 6x
2x - 4x + 6x = 24 - 4
4x = 20 /4
x = 5
Szczegółowe wyjaśnienie:
