a,40-(x+3)=27 b, -30+(25-x)=-1. c,153-(2x-3)=100. d,(2x-3)-(x+2)=15. e,(5x-4)-(x+2)=18 j,-(24-3x)-(2x+6)=20

0 bình luận về “a,40-(x+3)=27 b, -30+(25-x)=-1. c,153-(2x-3)=100. d,(2x-3)-(x+2)=15. e,(5x-4)-(x+2)=18 j,-(24-3x)-(2x+6)=20”

1. Đáp án:

   a, 10

   b, -4

   c, 25

   d, 10

   e, 3

   j, 50

   Giải thích các bước giải:

   a, 40-(x+3)=27 <=> x+3=40-27 <=> x+3=13 <=> x=10

   b, -30+(25-x)=-1 <=> 25-x=29 <=> x=-4

   c, 153-(2x-3)=100 <=> 2x-3=53 <=> 2x=50 <=> x=25

   d, (2x-3)-(x+2)=15 <=> x-5=15 <=> x=10

   e, (5x-4)-(x+2)=18 <=> 4x-6=18 <=> 4x=24 <=> x=4

   j, -(24-3x)-(2x+6)=20 <=> x-30=20 <=> x=50

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2. a.  40-(x+3)=27

   <=> x+3= 40-27

   <=> x+3=13

   <=> x=10

   b. -30+(25-x)=-1

   <=> 25-x =-1+30

   <=> 25-x=29

   <=> x=25-29 

   <=> x=-4

   c.153-(2x-3)=100

   <=> 2x-3= 153-100

   <=> 2x-3=53

   <=> 2x=56

   <=> x=28

   d. (2x-3)-(x+2)=15

   <=> 2x-3-x-2=15

   <=> x-5=15

   <=> x=20 

   e. (5x-4)-(x+2)=18

   <=> 5x-4-x-2=18

   <=> 4x=18+6=24

   <=> x=6

   j.  -(24-3x)-(2x+6)=20

   <=> -24+3x-2x-6=20

   <=>x-30=20 

   <=> x=50 

    

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