rozwiąż równania r+13 = 61 5a -2=33 7-3b=25
r+13=61
r=61-13
r=48
5a-2=33
5a=33+2
5a=35:5
a=7
7-3b=25
-3b=25-7
-3b=18:(-3)
b=-6
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r+13=61
r=61-13
r=48
5a-2=33
5a=33+2
5a=35:5
a=7
7-3b=25
-3b=25-7
-3b=18:(-3)
b=-6