Both of the angles need to equal to 180 (since they are interior angles)
2x+76=180
2x=104
x=52
Hope this helps!! :)
27x^2 - 42x + 12
3 is a common factor:-
= 3(9x^2 - 14x + 4)
That is the equivalent expression.
I will send you a hopefully helpful link. https://www.ncdc.noaa.gov/sotc/national/201403
