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x=2,75
3. 1/5x = -3 | :
x=15
4. 4 - x = -2 | -4
-x= -6
x=6
5. 5x + 1 = 16|-1
5x=15 |:5
x=3
6. 4x - 4 = 3 |+4
4x=7|:4
x=1,75
7. 3c + 2 = -70 |-2
3c=-72|:3
c= -24
8. -15 + -46 = -1 tu nie ma niewidomych ;)
9. -4c - 46 = -2 |+46
-4c=44|: (-4)
c= -11
10. 6y - 13 = -52 |+13
6y= -39| :6
y= -6.5
11. 4m + 9 = 45 |-9
4m=36|:4
m=9
12. 23 + 9y = 50 |-23
9y=27|:9
y=3
| - ta kreska oznacza, ze po ubu stronach wykonujemy dzialanie. Mam nadzieje, ze pomoglam ;)