Odpowiedzi

2010-04-15T16:46:14+02:00
1. 7x+14=x-22
7x - x = -22 - 14
6x = -36 /: 6
x = -6
2. -5x+12+x=2x-12
-5x + x - 2x = -12 - 12
-6x = -24 /: (-6)
x = 4
3. 2(x-3)+3(4-x)=5
2x - 6 + 12 - 3x = 5
2x - 3x = 5 - 12 + 6
-x = -1 /: (-1)
x = 1
1 5 1
2010-04-15T16:48:57+02:00
7x-x=-22-14
6x=-36
x=-6

-5x+x-2x=-24
-6x=-24
x=4

2x-6+12-3x=5
x=1
Jakieś pytania proszę pytac
2010-04-15T16:50:06+02:00
1.
7x + 14 = x - 22 |-x
7x - x + 14 = -22 |-14
6x = -22 - 14
6x = -36 |/6
x = -6

2.
-5x + 12 + x = 2x - 12
-5x +x - 2x = -12 - 12
-6x = -24
x = 4

3.
2(x-3)+3(4-x) = 5
2x-6+12-3x=5
2x-3x = 5+6-12
-x=-1
x=1