12(x-1)=0
=> x-1 =0
=> x=1
6x-5=613
=>6x=613+5
=>6x=618
=> x= 618 :6
=> x=103
tíc mình nha
1/ 12 . ( x - 1) = 0
=> x - 1 = 0
=> x = 1
2/ 6x - 5 = 613
6x = 618
x = 103
3/ 315 + (146 - x) = 401
146 - x = 86
x = 146 - 86
x = 60
1/ 12 . ( x - 1 ) = 0
( x - 1 ) = 0 : 12
( x - 1 ) = 0
=> x = 0+ 1
= 1
2/ 6 . x - 5 = 613
= \(\frac{2}{6}.x-5=613\)
= \(\frac{2}{6}.x=613+5=618\)
= \(\frac{2}{6}.x=618\)
= \(\Rightarrow x=618:\frac{2}{6}=1854\)
1/ 12 . (x - 1) = 0
=> x - 1 = 0
=> x = 1
2/ 6 . x - 5 = 613
=> 6x = 613 + 5
=> 6x = 618
=> x = 103
3/ 315 + (146 - x) = 401
=> 146 - x = 401 - 315
=> 146 - x = 86
=> x = 60
1/ 12 . ( x - 1 ) = 0
=> x - 1 = 0
x = 0 + 1
x = 1
Vậy x = 1
2/ 6 . x - 5 = 613
6x = 613 + 5
6x = 618
x = 103
Vậy x = 103
3/ 315 + ( 146 - x ) = 401
146 - x = 401 - 315
146 - x = 86
x = 146 - 86
x = 60
Vậy x = 60
3/ 315 + ( 146 - x ) = 401
= ( 401 - 315 )
= 86
= 146 - 86
= 60