Question

Find the value of x.

Answer 1

x = 25

Explanation:

The top angle is the supplement of 3x - 10

180 - (3x - 10) = -3x + 190

The sum of the angles in a triangle is 180

(-3x + 190) + (25) + (x + 15) = 180

Combine like terms

-2x + 230 = 180

Subtract 230 from both sides

-2x = -50

Divide both sides by -2

x = 25