Question

Solve equation and justify each step 9x-5=3x+7 ?

Answer 1

`\sf \: x = 2`

Explanation:

Now we have to,

→ find the required value of x.

The equation is,

`\sf \rightarrow \: 9x - 5 = 3x + 7`

Then the value of x will be,

`\sf \rightarrow \: 9x - 5 = 3x + 7`

`\sf \rightarrow \: 9x - 3x = 7 + 5`

`\sf \rightarrow \: 6x = 12`

`\sf \rightarrow \: x = (12)/(6)`

`\sf \rightarrow \: x = 2`

Hence, the value of x is 2.

Answer 2

`9x-5=3x+7`

Subtract 3x from both sides:

`9x-5-3x=3x+7-3x`

`6x-5=7`

Add 5 to both sides:

`6x-5+5=7+5`

`6x=12`

Divide both sides by 6:

`(6x)/(6) =(12)/(6)`

`\fbox{x = 2}`