Odpowiedzi

2010-03-07T18:58:55+01:00
A.)-5x-5=5 / +5
-5x = 10 / /5
x = 2

b.)1/2x+=-6 /*2
x = -12

d.)3x-4=5x+2 / -3x
-4 = 2x +2 /-2
-6=2x / /2
-3=x

e.)7-2x=7x-2 /+2x
7= 9x -2 / +2
9 = 9x / /9
x=1
2010-03-07T19:12:22+01:00
A.)-5x-5=5
-5x=10
x=-2
b.)1/2x+=-6
?
c.)o,6-3/4x=-1/3
-3/4x=-1/3-0,6
-45/60x=-20/60-36/60
-45/60x=-56/60 /*-60/45
x=56/45
d.)3x-4=5x+2
-2x=6
x=-3
e.)7-2x=7x-2
-9x=-9
x=1
f.)2/3(6x-9)=12
12/3x=12+18/3
4x=18
x=4,5
g.)1/10(25x-40)+2=3/4(8x+12)-9
25/10x-40/10+2=24/4x=26/4-9
2,5x-6x=4-2-9+6,5
-3,5x=-0,5
x=1/7
2010-03-07T19:17:04+01:00
A.)-5x-5=5
-5x=10
x=-2
b.)1/2x+=-6
?
c.)o,6-3/4x=-1/3
-3/4x=-1/3-0,6
-45/60x=-20/60-36/60
-45/60x=-56/60 /*-60/45
x=56/45
d.)3x-4=5x+2
-2x=6
x=-3
e.)7-2x=7x-2
-9x=-9
x=1
f.)2/3(6x-9)=12
12/3x=12+18/3
4x=18
x=4,5
g.)1/10(25x-40)+2=3/4(8x+12)-9
25/10x-40/10+2=24/4x=26/4-9
2,5x-6x=4-2-9+6,5
-3,5x=-0,5
x=1/7