Question

Does anyone knows how to do that?
I need to solve for x

Answer 1

`x=17`°

Explanation:

Because the diagonal lines are marked with arrows, we know that they are parallel. The two angles that are marked with measures are same-side interior angles. Same-side interior angles of parallel lines are supplementary, meaning that the sum of their measures is
`180`°.

Now, with all of this information, we can set up the following equation and solve for
`x`:

`115+4x-3=180`

`112+4x=180` (Simplify LHS by combining like terms)

`112+4x-112=180-112` (Subtract
`112` from both sides of the equation to isolate
`x`)

`4x=68` (Simplify)

`(4x)/(4)=(68)/(4)` (Divide both sides of the equation by
`4` to get rid of
`x`'s coefficient)

`x=17`° (Simplify)

Hope this helps!