Question

1, Tìm x biết:

a/ |2x-3| - |2+3x| = 0

b/ |2+3x|=|4x-3|

Answer 1

a/ |2x - 3| - |2 + 3x| = 0

=> |2x - 3| = |2 + 3x|

=> 2x - 3 = 2 + 3x

=> -3 - 2 = 3x - 2x

=>   -5    =    x

=> x = -5

vậy x = -5

b/ |2 + 3x| = |4x - 3|

=> 2 + 3x = 4x - 3

=> 2 + 3 = 4x - 3x

=> 5 = x 

vậy x = 5