Question

#6 I need help with that.

Answer 1

x=15 degrees

Explanation:

The given triangle is isosceles, so both base angles are both (3x+18).

We also know that angles on a line add up to 180 degrees, so

(3x+18) + (8x-3) = 180 degrees

Simplify

11x + 15 = 180 degrees

11x = 180-15 = 165

Divide by coefficient on left-hand side

x = 165/11 = 15 degrees.

Answer 2

Answer is x= 15

Explanation:

(3x+18)+(8x-3)=180

11x+15=180

11x=165

x=15