Odpowiedzi

2009-05-21T15:17:44+02:00
-5x+19=-2x+9
-5x+2x=9-19
-3x=-10 / (-3)
x=10/3
x=3 i 1/3

7x+2=5+3x+9
7x-3x=5+9-2
4x=12 /4
x=3

3(x-4)-4(2x+7)=2(x+5)
3x-12-8x-28=2x+10
3x-8x-2x=10+28+12
-7x=50 / (-7)
x=-50/7
x=-7 i 1/7

3(3-x)+2x=8-2(x-1)
9-3x+2x=8-2x+2
-3x+2x+2x=8+2-9
x=1