Well you do 228/12 to find your answer and that is 19 and to check you do 12*19=228
The answer would be 18 because if you put 3a+6a+a=180 (the degrees of a triangle) and solve it a becomes 18
Answer:
a
Step-by-step explanation:
Answer:
the statements are not written here .
7x+(x+20)=180
Just simplify. Hope this helped:)