Rozwiąż równania.
1) 2x - 7 = 3 +
2) = -2(3-5x)
3) = -
4) - - 1 = 3 -
5) - 4 = - x
1)
2x-7=3+x:8 |×8
16x-56=24+x
16x-x=24+56
15x=80 |: 15
x=5,33(3)
2)
(2x+6):5=-6+10x |×5
2x+6=-30+50x
2x-50x=-30-6
-48x=-36 |:(-48)
x=0,75
3)
(2x-4):6=1/3- (2(3-x)):3 |6
2x-4=2-(12-4x)
2x-4=2-12+4x
2x-4x=2-12+4
-2x=-6 |:(-2)
x=3
4)
(-x-3):5-1=3-5x:2 |10
-2x-6-10=30-25x
-2x+25x=30+6+10
23x=46 |:23
x=2
5)
(2x+6):9-4=(2x+3):6-x |×18
4x+12-72=6x+9-18x
4x-6x+18x=9-12+72
16x=69 |:16
x=4,3125
LICZE NA NAJ
1)2x-7=3+x/8 /*8
15x=80/:15
x=6
2) = -2(3-5x) /*5
2x+6=-10(3-5x)
2x-6=-30+50x
-48x=-24 /:-48
x=1/2
3) = - /*6
2x-4=2-4(3-x)
-2x=-6 /:-2
4)- - 1 = 3 - /*10
23x=46/:23
5) - 4 = - x /*18
4(x+3)-72=3(2x+3)-18x
4x-6x+18x=9+72-12
16x=69/:16
x=69/16
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1)
2x-7=3+x:8 |×8
16x-56=24+x
16x-x=24+56
15x=80 |: 15
x=5,33(3)
2)
(2x+6):5=-6+10x |×5
2x+6=-30+50x
2x-50x=-30-6
-48x=-36 |:(-48)
x=0,75
3)
(2x-4):6=1/3- (2(3-x)):3 |6
2x-4=2-(12-4x)
2x-4=2-12+4x
2x-4x=2-12+4
-2x=-6 |:(-2)
x=3
4)
(-x-3):5-1=3-5x:2 |10
-2x-6-10=30-25x
-2x+25x=30+6+10
23x=46 |:23
x=2
5)
(2x+6):9-4=(2x+3):6-x |×18
4x+12-72=6x+9-18x
4x-6x+18x=9-12+72
16x=69 |:16
x=4,3125
LICZE NA NAJ
1)2x-7=3+x/8 /*8
16x-56=24+x
15x=80/:15
x=6
2) = -2(3-5x) /*5
2x+6=-10(3-5x)
2x-6=-30+50x
-48x=-24 /:-48
x=1/2
3) = - /*6
2x-4=2-4(3-x)
2x-4=2-12+4x
-2x=-6 /:-2
x=3
4)- - 1 = 3 - /*10
-2x-6-10=30-25x
23x=46/:23
x=2
5) - 4 = - x /*18
4(x+3)-72=3(2x+3)-18x
4x+12-72=6x+9-18x
4x-6x+18x=9+72-12
16x=69/:16
x=69/16