Question

Tìm x 

x + 83 + x + 84 + x + 87 = 387

Answer 1

`3x = 387-254`

`3x = 133`

`-> x = 133/3`

Answer 2

\(\left(x+x+x\right)+\left(83+84+87\right)=387\\ 3x+254=387\\ 3x=387-254\\ 3x=133\\ x=\dfrac{133}{3}\)

Answer 3

`x + 83 + x + 84 + x + 87 = 387`

`=>( x + x + x ) + ( 83 + 84 + 87 )  = 387`

`=> 3x + 254 = 387`

`=> 3x = 387 - 254`

`=> 3x = 133`

`=> x = 133 : 3`

`=> x = 133/3`

Answer 4

3*x+(83+84+87)=387