a. 245 - ( x - 6 ) = 18
x - 6 = 245 - 18
x - 6 = 227
x = 227 + 6 = 233
b, ( x - 34 ) . 15 - 15 = 0
( x - 34 ) . 15 = 15
x - 34 = 15 : 15 = 1
x = 1 + 34 = 35
b) ( x - 34 ) . 15 - 15 = 0
=> ( x - 3 4 ).15 = 15
=> x - 34 = 15 : 15
=> x- 34 = 1
=> x = 1 + 34
=> x = 35
a) 245 - ( x - 6 ) = 18
x - 6 = 245 - 18
x - 6 = 227
x = 227 + 6
x = 233
b) ( x - 34 ) nhan 15 - 15 = 0
( x - 34 ) nhan 15 = 15
( x - 34 ) = 15 : 15
( x- 34 ) =1
x = 1 + 34
x= 35
a) ( x - 34 ) . 15 = 0
=> x - 34 = 0
=> x = 34
b) 18( x - 16 ) = 18
=> x - 16 = 1
=> x = 17