Odpowiedzi

2010-03-23T19:11:35+01:00
A. -t+2=4+5t, -6t=2 I:(-2), t= -1/3
B. 2w+3=4w-5, -2w=-8 I:(-2), w=4
C. 2x-6=3(x+1), 2x-6=3x+3, -x=9, x=-9
D. 1/3(y-1)=5y, 1/3y-1/3=5y, -4 i 2/3y= 1/3, -14/3y=1/3 I × (-3/14), y=-1/14
E. 6z+8/2=4, 6z+4=4, 6z=0, z=0









2010-03-23T19:13:50+01:00
A)-t+2=4+5t
4+5t=-t+2/-4
5t=-t-2/+t
6t=-2/:6
t=1/3
b)2w+3=4w-5
4w-5=2w+3/-2w
2w-5=3/+5
2w=8/:2
w=4