9x + 81 = 18 + 360
9x + 18 = 540
9x = 540 - 18
9x = 522
x = 522 : 9
x = 58
9x + 81 = 18 + 360
9x + 18 = 378
9x = 378 - 81
9x = 297
9x = khớp với 297
nên 9x = 97
9x + 81 = 18 + 360
9x =18 +360 - 81
9x =297
x =297:9
x = 33
9x + 81 = 18 + 360
9x + 81 = 378
9x = 378 - 81
9x = 297
x = 297 : 9
x = 33
9x + 81 = 18 + 360
9x =18 + 360 -81
9x =297
x =297 : 9
x =33
\(9x+81=18+360\)
\(9x+81=378\)
\(9x=378-81\)
\(9x=297\)
\(x=297\div9\)
\(x=33\)
9x+81=378
9x=378-81
9x=297
x=297:9
x=33
9x+81=378
9x=378-81
9x=297
x=297:9
x=33