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cât face 4[0,5+0,8(3) •x] =5x

Răspuns :

4[0,5+0,8(3) •x] =5x
4[1/2+(83-7)x/90] =5x
4(1/2+75x/90) =5x
4(1/2+5x/6) =5x
 
2+10x/3=5x
6+10x=15x
5x=6
x=6/5