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5x=44+1
5x=45 /:5
x=9
Sprawdzenie:
5*9-1=44
45-1=44
44=44
3x+5=26
3x=26-5
3x=21/ :3
x=7
Sprawdzenie:
3*7+5=26
21+5=26
26=26
7+4x=-5
4x=-5-7
4x=-12/:4
x=-3
Sprawdzenie:
7+4*(-3)=-5
7+(-12)=-5
7-12=-5
-5=-5