

bài 1
a) (2x - 17 ) - ( x - 25 )= -20
b) x - ( 25-x ) = 3x -14
c) 3.(x+5) - 6. ( x + 7)= -12
d) 4.( x -3 ) - 5 . ( x - 7 ) = -18
a) (2x - 17 ) - ( x - 25 )= -20
b) x - ( 25-x ) = 3x -14
c) 3.(x+5) - 6. ( x + 7)= -12
d) 4.( x -3 ) - 5 . ( x - 7 ) = -18