Odpowiedzi

2010-02-27T08:19:09+01:00
X/₃ +1=⅚ + x/₂
0,6+x/2 = x+1
2x-3/4=1/2+x
x+2/9 + x-1/3 = 1
2x+3/5= 2-x/3 + x


a)x/₃ +1=⅚ + x/₂ /*6
2x+6=5+3x
x=1

b) 0,6+x/2 = x+1 /*2
1,2+x=2x+2 /*10
12+10x=20x+20
10x=-8 /:10
x=-4/5

c)2x-3/4=1/2+x /*4
8x-3=2+4x
4x=5 /:4
x=5/4

d)x+2/9 + x-1/3 = 1 /*9
9x+2+9x-3=9
18x=10 / :18
x=5/9

e)2x+3/5= 2-x/3 + x /*15
30x+9=30-5x+15x
20x=21 /:20
x=21/20