Răspuns:
[18:(-3)³-7^(-2)*5,(4)]*(x-1)= √4+2x
[18:(-27)-1/49*49/9]*(x-1)=√4+2x
(2/(-3)-1/9)*(x-1)=√4+2x
((-6-1)/9)*(x-1)=√4+2x
(-7)*(x-1)=9(√4+2x)
(-7)x+7=9√4+18x
25x=7-18=-11
x=(-11)/25
