Question

X + 21 - 1/3x = 9
please show step by step!!​

Answer 1

x = -18

Explanation:

`x + 21 - (1)/(3)x = 9`

Combine x and
`(1)/(3)` to get
`(2)/(3) x`.

`(2)/(3)x + 21 = 9`

Subtract 21 from both sides.

`(2)/(3) x = 9 - 21`

Subtract 21 from 9 to get −12.

`(2)/(3)x = -12`

Multiply both sides by
`(3)/(2)`, the reciprocal of
`(2)/(3)`.

`x = 12` ×
`((3)/(2) )`

Express −12 ×
`((3)/(2))` as a single fraction.

`x = (-12 x 3)/(2)`

Multiply −12 and 3 to get −36.

`x = (-36)/(2)`

Divide −36 by 2 to get −18.

x = -18

hope it helps and have a great day! =D

~sunshine~