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Rezolva ecuatiile:
1) (x+2):3=6
2) 72:(x+3)=18
3) (13-x):3=5
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Răspuns :

Nata11
1) (x+2):3=6
x+2=18
x=16
(16+2):3=6

2) 72:(x+3)=18
x+3=18*72
x+3=1296
x=1293
72:(1293+3)=18

3) (13-x):3=5
13-x=5*3
13-x=15
x=15+13
x=28
(13-28):3=5
a) (x+2):3=6, x+2=6*3, x+2=18, x=18-2, x=16, ;b) 72:(x+3)=18, x+3=18*72, x+3=1296, x=1296-3 ,x=1293, c) (13-x):3=5 ,13-x=5+3,  13-x=5+3, 13-x=8 ,-x=8-13, -x=-15 

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