Question

Two supplementary angles are (2x - 5)" and (7x + 5)", find the angles​

Answer 1

Answer:

Two angles are 35° and 145°

Step-by-step explanation:

2x-5 + 7x+5 = 180 ( sum of supplementary angles 180°)

9x = 180

x = 180/9

x=20

2x-5 = 2×20-5 = 40-5 = 35

7x+5 = 7×20 +5 = 140 +5 = 145

Answer 2

Answer:

First angle =(2x-5)

Second angle =(7x+5)

(2x-5)+(7x+5)=180

9x=180

x=180/9

x= 20