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a)2 (2-x)=x-5 b)3 (2x-1)+4=7 i

Răspuns :

1)

2(2-x)=x-5

4-2x=x-5

-2x-x=-5-4

-3x=-9

3x=9

x=3

2)

3(2x-1)=7

6x-3=7

6x=10

x=10/6

x=5/3