Odpowiedzi

2010-03-29T17:03:32+02:00
A)-3x=2x-10
-3x-2x=-10
-5x=-10/: (-5)
x=2

b)2x-2= 7-x
2x+x=7+2
3x=9/:3
x=3

c)10=4-2x
2x=4-10
2x=-6/: 2
x=-3
1 1 1
2010-03-29T17:04:38+02:00
A)
-3x=2x-10
-3x-2x=-10
-5x=-10 |:(-5)
x=2

b)
2x-2=7-x
2x+x=7+2
3x=9 |:3
x=3

c)
10=4-2x
2x=4-10
2x=-6 |:2
x=-3
proszę
2010-03-29T17:05:08+02:00
A) -3x = 2x - 10
-3x - 2x = - 10
-5x = -10 / :-5
x = 2

b) 2x -2 = 7 -x
2x + x = 7 +2
3x = 9 /:3
x = 3

c) 10 = 4 - 2x
2x = 4 - 10
2x = -6 /:2
x= -3