Odpowiedzi

2010-02-16T19:42:16+01:00
2010-02-16T19:47:01+01:00
A) 2x - 7 = 5x + 3
2x - 5x = 7 + 3
- 3x = 10
x ≈ 3
b) 3(x-2)+x = 3x - 1
3x - 5 + x = 3x - 1
4x - 3x = 5 - 1
x = 4
c) x+4(x-1) = 2(x+2)
x + 4x - 4 = 2x + 4
5x - 2x = 4 -4
3x = 0
2010-02-16T19:48:30+01:00
A)2x-7=5x+3
2x-5x=3+7
-3x=10
x=10:(-3)
x=-3i1/3
b)3(x-2)+X=3x+1
3x-6+x=3x+1
3x+x-3x=1+6
x=7
c)x+4(x-1)=2(x+2)
x+4x-4=2x+4
5x-4=2x+4
5x-2x=4+4
3x=4
x=4:3
x=1 i 1/3