Question

Find the value of x. i need helppp

Answer 1

x = 26

The exterior angle measure is 147 degrees

Explanation:

Use the exterior angle measure formula

`60+(3x+9)=6x-9\\`

Combine like terms

`69+3x=6x-9`

Simplify

`3x+69=6x+-9`

Subtract 6x on both sides

`-3x+69=-9`

Subtract 69 on both sides

`-3x=-78`

Divide by -3

`x=26`

To find the exterior angle measure on itself, plug in 26 into the equation

`6 * 26-9`

Solve

147