Answer:
3/ 2
4/ 2
5/ I don't know
Step-by-step explanation:
I hope that it's a correct answers
I'm so sorry for 5 .
hint NOT answer-
28+5b=7a
30
x and y are supplementary angles, so their sum is 180°.
x+y = 180°
x is 16° less than three times y
x = 3y - 16°
(3y-16°) + y = 180°
4y = 196°
y = 49°
x = 3y-16° = 131°
