Question

HELPPP PLEASEEEEEE!!!!!!!!!1

Answer 1

Hi!

We can see the river is a straight line.

This means that the angles that fall upon it are supplementary angles, and will add up to 180 degrees.

Therefore:

$x+2x+21=180$

Combine like terms:

$3x+21=180$

Subtract 21 from both sides:

$3x=159$

Divide both sides by 3:

$x=53$

Therefore, the value of x is 53 degrees.