Odpowiedzi

2010-04-15T18:52:50+02:00
1
2u-10+15=3u-12+10
2u+5=3u-2
-u=-7
u=7

2
-y-3-2=4-4y
-y+4y=4+5
3y=9
y=3

3
2x-1-x+3=3
x=-2+3
x=1

4
2x=3-1
2x=2
x=1

5
0=x-1-3x+5
2x=4
x=2


2010-04-15T18:55:09+02:00
1) 2(y-5)+15=3(y-4)+10
2y-10+15=3y-12+10
-y=-7
y=7
2) -3(y/3+1)-2=4(1-y)
-y-3-2=4-4y
3y=9 /÷ 3
y=3
3) 2(x-1/2) -x+3=3
2x -1 -x+3=3
x=1
4)0=3-(2x+1)
0=3-2x-1
2x=2 /÷2
x=1
5) 0=(x-1)-(3x-5)
0=x-1-3x+5
2x=4 /÷2
x=2