Rozwiąż równanie.
1.2x+3=7
2.13-x=6
3.2x+5=26
4.31x-30=30
5.12(x-1)=12
6.5x-1=-1
7.4(x-3)-10=0
8.x+2=6
9.2x=4
10.x+2=1
11.2x=-3
12.3x+5=1
13.x+5=10
14.2x+3=15
15.5x+13=23
16.3x+11=41
17.-x+2=8
18.-x+5=-2
19.2x-7=11
20.-5x+3=-12
21.-1,5x+2=9,5
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1. 2x+3=7
2x=7-3
2x=4|:2
x=2
2. 13-x=6
-x=6-13
-x=-7|:-1
x=7
3. 2x+5=26
2x=26-5
2x=21|:2
x=10,5
4. 31x-30=30
31x=30+30
31x=60|:31
x=1,9
5. 12(x-1)=12
12x-12=12
12x=12+12
12x=24|:12
x=2
6. 5x-1=-1
5x=-1+1
5x=0|:5
x=0
7. 4(x-3)-10=0
4x-12-10=0
4x=0+12+10
4x=22|:4
x= 5,5
8. x+2=6
x=6-2
x=4
9. 2x=4|:2
x=2
10. x+2=1
x=1-2
x=-1
11. 2x=-3
x=-3|:2
x=-1,5
12. 3x+5=1
3x=1-5
3x=-4|:3
x=-1,3
13. x+5=10
x=10-5
x=5
14. 2x+3=15
2x=15-3
2x=12|:2
x=6
15. 5x+13=23
5x=23-13
5x=10|:5
x=2
16. 3x+11=41
3x=41-11
3x=30|:3
x=10
17. -x+2=8
-x=8-2
-x=6|:-1
x=-6
18. -x+5=-2
-x=-2-5
-x=-7|:-1
x=7
19. 2x-7=11
2x=11+7
2x+18|:2
x=9
20. -5x+3=-12
-5x=-12-3
-5x=-15|:-5
x=3
21. -1,5x+2=9,5
-1,5x=9,5-2
-1,5x=7,5|:-1,5
x= -5
Liczę na naj! ;]
1.2x+3=7|-3
2x=4|/2
x=2
2.13-x=6|-3
-x=-7|*(-1)
x=7
3.2x+5=26|-5
2x=21|/2
x=10,5
4.31x-30=30|+30
31x=60
x (w zaokrągleniu) 1,9
5.12(x-1)=12|/12
x-1=1|-1
x=0
6.5x-1=-1|+1
5x=0|/5
x=0
7.4(x-3)-10=0
4x-12-10=0
4x-22=0|+22
4x=22|/4
x=5,5
8.x+2=6|-2
x=4
9.2x=4|/2
x=2
10.x+2=1|-2
x=-1
11.2x=-3|/2
x=-1,5
12.3x+5=1|-6
3x=-4|/3
x=1,(3)
13.x+5=10|-5
x=5
14.2x+3=15|-3
2x=12|/2
x=6
15.5x+13=23|-13
5x=10|/5
x=2
16.3x+11=41|-11
3x=30|/3
x=10
17.-x+2=8|-2
-x=6|/(-1)
x=-6
18.-x+5=-2|-5
-x=-7|/(-1)
x=7
19.2x-7=11|+7
2x=18|/2
x=9
20.-5x+3=-12|+3
-5x=-9|/(-5)
x=1,8
21.-1,5x+2=9,5|-2
-1,5x=7,5|/(-1,5)
x=-5