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Tichindeleancri
a fost răspuns

2(x+1) egel12

7(x-2) egal 21

4(x-2) egal 0

Răspuns :

2(x+1)=12
2x+2=16
2x=16-2
x=14/2
x=7

7(x-2)=21
7x-14=21
7x=21+14
x=35/7
x=5

4(x-2)=0
4x-8=0
4x=8
x=8/4
x=2
Beatricebea858
2(x+1)=16
2x+2=16
2x= 16-2
2x=14
x=14:2
x=7

7(x-2)=21
7x+14= 21
7x= 21+14
7x= 35
x= 35 :7 
x=5 
4(x-2)=0
4x-8=0
4x= 0+8
4x= 8
x= 8:4
x= 2  

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