Rozwiąż równiania:
a)1/3x-2=x+2
b)1-6/7x=4/7
c)6(1/4x-2)=18
d)x/6-1/6=1
e)-2(2x-1)=x/3
f)2/5(3-x)=-2
g)3/4(2-3x)=-6
h)1/5(x-3)=9-x
i)0,6+x
---------- = x+1
2
1/3 |
6/7 |
4/7 |
1/4 |
x/6 | ------> ułamki
1/6 |
x/3 |
2/5 |
3/4 |
1/5 |
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a)
1/3x-2=x+2
⅓x-x=2+2
⅓x-x=4
⅓x-1/1x=4
⅓x-3/3x=4
-⅔x=4 /:(-⅔)
x=4:(-⅔)
x=4*(-3/2)
x=-12/2
x=-6
b)
1-6/7x=4/7
-6/7x=4/7-1
-6/7x=4/7-1/1
-6/7x=4/7-7/7
-6/7x=-3/7 /:(-6/7)
x=(-3/7):(-6/7)
x=(-3/7)*(-7/6)
x=3/6
x=½
c)
6(1/4x-2)=18
6/4x-12=18
3/2x=18+12
3/2x=30 /:3/2
x=30:3/2
x=30*⅔
x=60/3
x=20
d)
x/6-1/6=1
x/6=1+1/6
x/6=1/1+1/6
x/6=6/6+1/6
x/6=7/6 /*6
x=7/6*6
x=7
e)
-2(2x-1)=x/3
-4x+2=⅓x
-4x-⅓x=-2
-4/1x-⅓x=-2
-12/3x-⅓x=-2
-13/3x=-2 /:(-13/3)
x=-2:(-13/3)
x=-2*(-3/13)
x=6/13
f)
2/5(3-x)=-2
6/5-⅖x=-2
-⅖x=-2-6/5
-⅖x=-2/1-6/5
-⅖x=-10/5-6/5
-⅖x=-16/5 /:(-⅖)
x=(-16/5):(-⅖)
x=(-16/5)*(-5/2)
x=8
g)
3/4(2-3x)=-6
6/4-9/4x=-6
3/2-9/4x=-6
-9/4x=-6-3/2
-9/4x=-6/1-3/2
-9/4x=-12/2-3/2
-9/4x=-15/2 /:(-9/4)
x=(-15/2):(-9/4)
x=(-15/2)*(-4/9)
x=60/18
x=30/9
x=10/3
x=3⅓
h)
1/5(x-3)=9-x
⅕x-⅗=9-x
⅕x+x=9+⅗
⅕x+1/1x=9/1+⅗
⅕x+5/5x=45/5+⅗
6/5x=48/5 /:6/5
x=48/5:6/5
x=48/5*5/6
x=8
i)
(0,6+x)/2=x+1 /*2
0,6+x=2x+2
x-2x=2-0,6
-x=1,4 /*(-1)
x=-1,4