Question

Neeeedddd Helpppp Plzzzzz

Answer 1

Answer:

x = 45

x = 19

Step-by-step explanation:

A straight line = 180°

So,

12.

3x + x = 180

4x = 180

----   -----

4      4

x = 45

13.

(5x + 4) + (x - 2) + (3x + 7) = 180

Combine like terms:

(5x + 4) + (x - 2) + (3x + 7) = 180

9x + 4 - 2 + 7 = 180

9x + 9 = 180

      -9     -9

------------------

   9x = 171

  -----   -----

    9       9

     x = 19

Hope this helped.

Answer 2

Answer:

10) x = 45

11) x = 171 / 9

Step-by-step explanation:

10) 3x + x = 180 , x = 45

11) (5x+4) + (x-2) + (3x+7) = 180 , 9x + 9 = 180

9x = 171 , x = 171 / 9