rozwiazać równania: a+2=a*2 i a+2=a*(-2)
a+2=a*2
a+2=2a
a-2a=-2
-a=-2 /*(-1)
a=2
a+2=a*(-2)
a+2=-2a
a+2a=-2
3a=-2 /:3
a=-⅔
2=2a-a
2=a
2=-2a-a
2=-3a / :(-3)
-2/3=a
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a+2=a*2
a+2=2a
a-2a=-2
-a=-2 /*(-1)
a=2
a+2=a*(-2)
a+2=-2a
a+2a=-2
3a=-2 /:3
a=-⅔
a+2=a*2
a+2=2a
2=2a-a
2=a
a+2=a*(-2)
a+2=-2a
2=-2a-a
2=-3a / :(-3)
-2/3=a