( x – 78 ) . 26 = 0 59 . ( x – 5 ) = 59 ( y -14 ) : 2 = 3 ( 30 – y ) . 4 = 92 124 + ( 118 – x ) = 217 814 + ( x – 305 ) = 712 x – 32 : 16 = 48 (

0 bình luận về “( x – 78 ) . 26 = 0 59 . ( x – 5 ) = 59 ( y -14 ) : 2 = 3 ( 30 – y ) . 4 = 92 124 + ( 118 – x ) = 217 814 + ( x – 305 ) = 712 x – 32 : 16 = 48 (”

1. ( x – 78 ) . 26 = 0

   ⇒ x – 78 = 0 

   ⇒x = 78

   59 . ( x – 5 ) = 59

   ⇒x-6=1

   ⇒x=7

   ( y -14 ) : 2 = 3

   ⇒y-14=6

   ⇒y=20

   ( 30 – y ) . 4 = 92

   ⇒30-y=23

   ⇒y=7

   124 + ( 118 – x ) = 217

   ⇒118-x=93

   ⇒x=25

   814 + ( x – 305 ) = 712

   ⇒x-305=(-102)

   ⇒x=203

   x – 32 : 16 = 48

   ⇒x-2=48

   ⇒x=50

   ( x – 32 ) : 16 = 48

   ⇒x-32=768

   ⇒x=800

   48475 – ( 10425 + x ) = 3828 : 12

   ⇒48475 – ( 10425 + x ) = 319

   ⇒10425 + x=48156

   ⇒x=37731

   Bình luận

2. $(x-78).26=0$

   $x-78=0:26$
   $x-78=0$
   $x=0+78$
   $x=78$

   —————–
   $59.(x-5)=59$

   $x-5=59:59$
   $x-5=1$
   $x=1+5$
   $x=6$

   —————–
   $(y-14):2=3$

   $y-14=3×2$
   $y-14=6$
   $y=6+14$
   $y=20$

   —————–
   $(30-y).4=92$

   $30-y=92:4$
   $30-y=23$

   $y=30-23$
   $y=7$

   —————–
   $124+(118-x)=217$

   $118-x=217-124$
   $118-x=93$
   $x=118-93$
   $x=25$

   —————–

   $814+(x-305)=712$

   $x-305=712-814$

   $x-305=-102$
   $x=-102+305$
   $x=203$

   —————–
   $x-32:16=48$

   $x-2=48$
   $x=48+2$
   $x=50$

   —————–
   $(x-32):16=48$

   $x-32=48×16$
   $x-32=768$
   $x=768+32$
   $x=800$

   —————–
   $48475-(10425+x)=3828:12$

   $48475-(10425+x)=319$
   $10425+x=48475-319$
   $10425+x=48156$
   $x=48156-10425$
   $x=37731$

   Bình luận