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[18:(-3)^{2} -7^{2} ·5,(4)]·(x-1)= \sqrt{4} +2x
Vă rog 25puncte


Răspuns :

 [18/-27 - 1/49 * 54-5/9 ](x-1)=2+2x
[-6/9 - 1/9 ](x-1)=2+2x
-7/9 (x-1)=2+2x
-7(x-1)=9(2+2x)
-7x+7 = 18 +18x
-11=25x
x=-25/11