Question

a)\(4x+3x=217\) 

b)\(9x-3x=216\) 

c)\(6x-3x+23=230\) 

d)\(5x+3x+x=72\) 

 giúp mk với mn ơi😢

Answer 1

a) 4x + 3x = 217

  x( 4 + 3 ) = 217

  7x = 217

   x = 217 : 7 = 31

Vậy x = 31
b) 9x - 3x = 216

    ( 9 -3)x = 216

     6x = 216

   x = 216:6 = 36

Vậy x = 36

c) 6x - 3x + 23 = 230

( 6 - 3 )x = 230 - 23

    3x = 207

     x = 207 : 3 = 69

Vậy x = 69

d) 5x + 3x + x = 72

     5x + 3x + 1x = 72

    ( 5 + 3 + 1 )x = 72

                9x = 72

               x = 72 : 9 = 8

Vậy x = 8

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Answer 2

a) \(4x+3x=217\)

\(\Rightarrow x\cdot\left(3+4\right)=217\)

\(\Rightarrow7x=217\)

\(\Rightarrow x=\dfrac{217}{7}\)

\(\Rightarrow x=31\)

b) \(9x-3x=216\)

\(\Rightarrow x\cdot\left(9-3\right)=216\)

\(\Rightarrow6x=216\)

\(\Rightarrow x=\dfrac{216}{6}\)

\(\Rightarrow x=36\)

c) \(6x-3x+23=230\)

\(\Rightarrow x\cdot\left(6-3\right)=230-23\)

\(\Rightarrow3x=207\)

\(\Rightarrow x=\dfrac{207}{3}\)

\(\Rightarrow x=69\)

d) \(5x+3x+x=72\)

\(\Rightarrow x\cdot\left(5+3+1\right)=72\)

\(\Rightarrow9x=72\)

\(\Rightarrow x=\dfrac{72}{9}\)

\(\Rightarrow x=8\)

Answer 3

c.on nhìu a

Answer 4

a) 4x + 3x = 217 x( 4 + 3 ) = 217 7.x = 217 x = 217 : 7 = 31 b) 9x - 3x = 216 ( 9 -3)x = 216 6.x = 216 x = 216:6 = 36 c) 6x - 3x + 23 = 230 ( 6 - 3 )x = 230 - 23 3x = 207 x = 207 : 3 = 69 d) 5x + 3x + x = 72 5x + 3x + 1x = 72 ( 5 + 3 + 1 )x = 72 9.x = 72 x = 72 : 9 = 8
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