Tìm X biết : ( X + 9 ) + ( X – 8 ) + ( X + 7 ) + ( X – 6 ) + ( X + 5 ) + ( X – 4 ) = 63,6 . 31/10/2021 Bởi Julia Tìm X biết : ( X + 9 ) + ( X – 8 ) + ( X + 7 ) + ( X – 6 ) + ( X + 5 ) + ( X – 4 ) = 63,6 .
$(x+9)+(x-8)+(x+7)+(x-6)+(x+5)+(x-4)=63,6$ $x+9+x-8+x+7+x-6+x+5+x-4=63,6$ $(x+x+x+x+x+x)+(9-8+7-6+5-4)=63,6$ $6x+3=63,6$ $6x=63,6-3$ $6x=60,6$ $6x=60,6:6$ $x=10,1$ Bình luận
`( x + 9 ) + ( x – 8 ) + ( x + 7 ) + ( x – 6 ) + ( x + 5 ) + ( x – 4 ) = 63,6 ` ` x + 9 + x – 8 + x + 7 + x – 6 + x + 5 + x – 4 = 63,6 ` ` (x + x + x + x+ x + x)+( 9 – 8 + 7 – 6 + 5 – 4) = 63,6 ` ` 6x+3 = 63,6 ` ` 6x= 63,6-3 ` ` 6x= 60,6 ` `x=60,6:6` `x=10,1` Bình luận
$(x+9)+(x-8)+(x+7)+(x-6)+(x+5)+(x-4)=63,6$
$x+9+x-8+x+7+x-6+x+5+x-4=63,6$
$(x+x+x+x+x+x)+(9-8+7-6+5-4)=63,6$
$6x+3=63,6$
$6x=63,6-3$
$6x=60,6$
$6x=60,6:6$
$x=10,1$
`( x + 9 ) + ( x – 8 ) + ( x + 7 ) + ( x – 6 ) + ( x + 5 ) + ( x – 4 ) = 63,6 `
` x + 9 + x – 8 + x + 7 + x – 6 + x + 5 + x – 4 = 63,6 `
` (x + x + x + x+ x + x)+( 9 – 8 + 7 – 6 + 5 – 4) = 63,6 `
` 6x+3 = 63,6 `
` 6x= 63,6-3 `
` 6x= 60,6 `
`x=60,6:6`
`x=10,1`