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3ori(2orix-5)=3 Afla x

Dau coroana!!


Răspuns :

3(2x-5)=3,6x-15=3,6x=3+15,6x=18,x=18/6,x=3
sau
3(2x-5)=3|:3,2x-5=1,2x=1+5,2x=6,x=6/2,x=3
3*(2*x-5) = 3
3*(-10x) = 3
-30x = 3
x = -30 : 3
x = -10