Odpowiedzi

2010-03-24T18:26:33+01:00
1. 11-6y=2y-15+7y+26
11+15-26=2y+7y
0=7y
y=0
2. 1-4x+5+2x=7-2x
-4x+2x+2x=7-1-5
0x=0
3. 10n-3-2n=3n-13+2n
10n-2n+3n-2n=-13-3
9n=10 /:9
n=1,1
4. 16+15x+4x-22=8x-27
15x+4x-8x=-27-16+22
11x=-22 /:11
x=-2
5. 3x-2+5x=4x+8-x
3x+5x-4x+x=8+2
5x=10 /:5
x=2
6. 4+2(x-1)=6
4+2x-2=6
4-2-6=2x
-4=2x /:2
x=-2
7. 6(3y+2)-5(4y+6)=-6
18y+12-20y+30=-6
18y-20y=-6-12-30
-2y=-48 /:(-2)
y=24