Question

7x-7/79 = 68x+8
Find X.

Answer 1

x = -639 / 4819 (x = -0.1326 [rounded])

Explanation:

7x - 7/79 = 68x + 8

{subtract 7x from both sides to begin to isolate x}

7x - 7/79 = 68x + 8

-7x - 7x

- 7/79 = 61x + 8

{subtract 8 from both sides to isolate x}

- 7/79 = 61x + 8

- 8 -8

{8 = 632/79}

- 639 / 79 = 61x

{divide both sides by 61 to isolate x}

-639 / 79 = 61x

÷ 61 ÷61
`-(639)/(79)` ÷
`(61)/(1)` =
`-(639)/(79)` *
`(1)/(61)` =
`-(639)/(4819)`

-639 / 4819 = x

(-639/4819 ≈ -0.1326 [rounded] )

{updates in bold}

Answer 2

`7x - (7)/(79) = 68x + 8 \\ 7x - 68x = 8 + (7)/(79 ) \\ - 61x = (639)/(79) \\ x = (639)/(79 * ( - )61) \\ x = (639)/( - 4819) \\ = - 0.132.......`