what is the answer to 1/2x-8=7

7 Answers

kingattaskus12's profile pic

kingattaskus12 | (Level 3) Adjunct Educator

Posted on

Solve for the value of x in `1/2x-8=7`


Since -8 does not contain the variable to solve for, move it to the right-hand side of the equation by adding 8 to both sides.

`1/2x=8+7`


Add 7 to 8 to get 15.

`1/2 x=15`


Multiply both sides of the equation by 2.

`x=15 · (2) `


Multiply 15 by 2 to get 30.

`x=30 `

baxthum8's profile pic

baxthum8 | High School Teacher | (Level 3) Associate Educator

Posted on

Solve `1/2x-8 = 7`

Isolate x, therefore add 8 to both sides.  This makes (-8) cancel on left.

`1/2x = 15` Now multiply both sides by 2, as  `1/2*2=1` 

`x = 30`

The solution is x = 30.

Check:


`(1/2)*30 - 8 = 7`

15 - 8 = 7

7 = 7

malkaam's profile pic

malkaam | Student, Undergraduate | (Level 1) Valedictorian

Posted on

1/2x - 8 = 7

We need to isolate x to the value of this variable,

1/2x - 8 = 7 

1/2x - 8 + 8 = 7 + 8             Add 8 to both sides

1/2x = 15

1/2x * 2/1 = 15 * 2/1            Multiply both sides by 2/1

x = 30 Answer. 

jess1999's profile pic

jess1999 | Student, Grade 9 | (Level 1) Valedictorian

Posted on

1/2x - 8 = 7

To solve this equation, first add 8 on both sides

By adding, your equation should look like

1/2x = 15 now divide 1/2 on both sides ( multiply 2/1 on both sides )

By dividing, your equation should look like

x = 30 which is your answer

nisarg's profile pic

nisarg | Student, Grade 11 | (Level 1) Valedictorian

Posted on

1/2x-8=7

1/2x=15        add 8 to both sides

x=30             multiply both sides by 2