\(x+78\cdot9=9\cdot45\)
\(\Leftrightarrow x+702=405\)
\(\Leftrightarrow x=-297\)
x + 78 x 9 = 9 x 45
x + 78 x 9 = 405
x + 702 = 405
x = 405 - 702
x= -297
x + 78 . 9 = 9 . 45
x +78 = 45
x = 45 - 78
x = -33
Vây x = -33
x+78x9=9x45
x+702 =405
x = 405-702
x =-297
k mik nha
x + 78 x 9 = 9 x 45
x + 78 = 45
x = 45 - 78
x = - 33
k mk nha
x+78x9=9x45
x+702=405
x =405-702
x =-297
x + 78 x 9 = 9 x 45
\(\Leftrightarrow x-702=406\)
\(\Leftrightarrow x=-297\)
x + 702 = 405
x = 405 - 702
x = -297
k cho minh nha