( x - 41 ) x 76 = 3 x 78
x - 41 = 3 x ( 78 : 76 )
x - 41 = 3 x 72
x - 41 = 3 x 49
x - 41 = 147
x = 147 + 41
x = 188
Vậy x = 188
Bài này khá dễ !
( x - 41 ) * 76 = 3 * 78
( x - 41 ) = 3 * ( 78 : 76 )
( x - 41 ) = 3 * 49
( x - 41 ) = 147
x = 147 + 41
x = 189
( x - 41 ) x 76 = 3 x 78
( x - 41 ) x 76 = 352947
x - 41 = 352947 : 76
x - 41 = 352947 : 117649
x - 41 = 3
x = 3 + 41
x = 44