Đáp án:
$a) (x-5) -[25 +(-9)] = 17 + (-3)$
$⇔(x-5) - 16 = 14$
$⇔x-5=14 +16$
$⇔x-5=30$
$⇔x=30+5$
$⇔x=35$
Vậy $x=35$
$b) (-3) -17 = (x+2)-[15-(-9)]$
$⇔-20 = (x+2) -24$
$⇔-20 +24 =x+2$
$⇔4 =x+2$
$⇔4-2=x$
$⇔2=x$
Vậy $x=2$
$c) [35 - (-5)] - [x - (-2)] =-4$
$⇔40 - (x+2)=-4$
$⇔x+2 =40 -(-4)$
$⇔x+2=44$
$⇔x=44 -2$
$⇔x=42$
Vậy $x=42$
$d) (x-13)+(-17) =-x+[25 +(-3)]$
$⇔(x-13) -17 = -x + 22$
$⇔x +x= 22 +17 +13$
$⇔2x = 52$
$⇔x= 52 : 2 $
$⇔x=26$
Vậy $x=26$
$e) (-19) -[x+(-30)] =x+19$
$⇔-19 - x +30 =x+19$
$⇔-x-x =19 -30 +19$
$⇔-2x=8$
$⇔x=8 : (-2)$
$⇔x=-4$
Vậy $x=-4$