Start by combing like terms. You will get 3x+12=51. Now subtract 12 from both sides (3x=39). Divide both sides by 3 (x=13). The answer is 13.
Answer:
3 and 5
Step-by-step explanation:
Alternate interior angles are the angles in between the two lines and on the inside
4 and 6
3 and 5
4 divided by 6 is 0.6666666667
