Question

^{giúp mik với ạ} 

Answer 1

`b)(x-3):2=6`

`x-3=6.2=12`

`x=12+3=15`

_________________________

`c)2x-138=62`

`2x=62+138=200`

`x=200:2=100`

_____________________________

`d)70-5(x-3)=45`

`5(x-3)=70-45=25`

`x-3=25:5=5`

`x=5+3=8`

Answer 2

\((x-3):2=6\)

\(x-3=6.2\)

\(x-3=12\)

\(x=12+3=15\)

\(------------------\)

\(2x-138=62\)

\(2x=62+138\)

\(2x= 200\)

\(x=200:2=100\)

\(----------------------\)

\(70-5(x-3)=45\)

\(5(x-3)=70-45\)

\(5(x-3)= 25\)

\(x-3=25:5\)

\(x-3=5\)

\(x=5+3=8\)

Answer 3

\(\left(x-3\right):2=6\)

\(\Rightarrow x-3=6.2\)

\(\Rightarrow x-3=12\)

\(\Rightarrow x=12+3\)

\(\Rightarrow x=15\)

\(b)2x-138=62\)

\(\Rightarrow2x=62+138\)

\(\Rightarrow2x=200\)

\(\Rightarrow x=200:2\)

\(\Rightarrow x=100\)

_____________

\(70-5\left(x-3\right)=45\)

\(\Rightarrow5\left(x-3\right)=70-45\)

\(\Rightarrow5\left(x-3\right)=25\)

\(\Rightarrow x-3=25:5\)

\(\Rightarrow x-3=5\)

\(\Rightarrow x=5+3\)

\(\Rightarrow x=8\)

Answer 4

`(x-3):2=6`

`x-3=6xx2`

`x-3=12`

`x=12+3`

`x=15`

____________________________

`2x-138=62`

`2x=62+138`

`2x=200`

`x=200:2`

`x=100`

________________________________

`70-5(x-3)=45`

`5.(x-3)=70-45`

`5.(x-3)=25`

`x-3=25:5`

`x-3=5`

`x=5+3`

`x=8`

__________________________________

`#LeMichael`

Answer 5

\(b,x-3=6.2\\ x-3=12\\ x=12+3\\ x=15\)

\(c,2x=62+38\\ 2x=100\\ x=100:2\\ x=50\)

(mà có thể là 62+138=2x nên 2x=200 và x=100 do ko thấy rõ)

\(d,5\left(x-3\right)=70-45\\ 5\left(x-3\right)=35\\ x-3=35:5\\ x-3=7\\ x=7+3\\ x=10\)

 

 

 

Answer 6

(x-3):2=6

x - 3 = 6. 2

x = 12+3
x = 15

2x - 138 = 62
2x = 62 + 138
  x = 200 : 2

  x = 100