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a) 5a = 0 (/5)
....a=0.........
b) -2w = -1/2 ("/" = kreska ułamkowa)*(-2)
.......w=1........
c) -7b = 7/8(/-7)
......b= -8..........
d) 22(-c) = -66/ (-/22)
c=3
1)x+3=5 | -3 (to to co trzeba w to wykropkowane wpisac) x=2
2)2x=4 | /2
3)x/2=1 |*2
4)4x=2+3x |-3x
5)2x=2+x |-x
6)x/4=1/2 |*4
7)0=2-x | +x
x=2
8)x-7=-5 |+7
9)