Odpowiedź:
a) 6x-(x-1)=6
6x-x+1=6
5x=6-1
5x=5
x=1
b) 2(x+3)=5
2x+6=5
2x=5-6
2x=-1
x=-½
c) 3(1-x)+2=-7
3-3x+2=-7
-3x=-7-2-3
-3x=-12
x=4
Liczę na naj ;)
6x - (x - 1) = 6
6x - x + 1 = 6
5x = 6 - 1
5x = 5
x = 1
2(x + 3) = 5
2x + 6 = 5
2x = 5 - 6
2x = -1
x = -0,5
3(1 - x) + 2 = -7
3 - 3x + 2 = -7
-3x = -7 -2 - 3
-3x = -12
x = 4
