Odpowiedzi

2010-04-13T18:46:39+02:00
2x+3/5=2-x/3+x /razy 15
30x+9=30-x+30x
30x+x-30=-9
x=-9
g.2x-1/5-x-2/2=0.7x /razy 10
20x-2-5x+10=7x
15x-7x=2-10
8x=-8
x=-1

h.2x-3x+5/4=-1/4x-1
-x+1/4x=1-5/4
-x+1/4x=-1/4
-3/4x=-1/4
x=3

d.7(y+3)=5y+2+2y
7y+21=7y+2
7y-7y=2-21
0=-19