a, Ta có:
(2x+35)-121=0
2x+35=121
2x=86
x=43
Vậy x=43.
b, 2013-x=|-2014|
2013-x=2014
x=2013-2014
x=-1
Vậy x=-1.
( 2x + 35) - 121 = 0 2013 - x= |-2014|
=>2x+35 =121 => 2013 -x =2014
=>2x =121-35 => x =2013-2014
=>2x =86 => x =-1
=>x =86:2 Vậy x=-1
=>x =43
Vậy x =43