1) 2a = 9b ⇒ 2:9
2) a + b = 3b ⇒ a = 2b ⇒ 1:2
Answers: 2:9 and 1:2
Answer:
-8,-7
Step-by-step explanation:
I think
9. x < −17
10. x < 6
11. 10 < x < 21
12. Move all terms not containing x from the center section of the inequality. No solution.
13. −3 < x < 3
Please give brainliest I worked hard.