a) 2x-1+ x =8
3x =9/ :3
x =3
Sprawdzenie:
2 *3 -1 +3= 8
6+2 =8
8=8
b) 2x - 6 - 7x = 9
-5x =15/ :(-5)
x = -3
2 *(-3) - 6 -7 *(-3) =9
-6 -6 + 21= 9
9 = 9
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a) 2x-1+ x =8
3x =9/ :3
x =3
Sprawdzenie:
2 *3 -1 +3= 8
6+2 =8
8=8
b) 2x - 6 - 7x = 9
-5x =15/ :(-5)
x = -3
Sprawdzenie:
2 *(-3) - 6 -7 *(-3) =9
-6 -6 + 21= 9
9 = 9
Licze na naaaaj :D