Question

Solve for x ????????

Answer 1

well find the inner part by subracting : 180 - 130 --> 50 so

Answer 2

you know the sum of the angles in a triangle is 180 right? so add all of the numbers inside
so 50 + 8x+4 + 12x-14 = 180
solve for x:)

Answer 3

so it could be \[\times >10\]

Answer 4

Theorem:
The measure of an exterior angle of a triangle equals the sum of the measures of the remote interior angles.

Answer 5

In your case, the given exterior angle has measure 130.
The two remote interior angles have measures 8x + 4 ans 12x - 14.
Set 130 equal to the sum of 8x + 4 and 12x - 14 and solve for x.