25 points! PLEASE HELP WITH THIS! Show how you got the answers DONT ANSWER IF YOU DONT KNOW IT!!

x=8

Step-by-step explanation:

The sum of interior angles of a triangle is 180°

9x+3+5x-2+11x-21=180°

25x-20=180

25x=180+20

25x=200°

x=200°/25

x=8

8.

Step-by-step explanation:

Sum of the interior angles of a triangle is 180°;

hence;

(9x + 3)° + (5x - 2)° + (11x - 21)° = 180°

grouping like terms:

9x + 5x + 11x + 3 - 2 - 21 = 180

25x - 20 = 180

25x = 180 + 20

25x = 200 dividing both sides by 25;

x = 8

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)

step-by-step explanation: