Question

I’m so confused someone please help!

Answer 1

Explanation:

7x - 42 + 5x = 180 {linear pair}

7x + 5x - 42 = 180 {Combine like terms}

12x - 42 =180

12x = 180 + 42

12x = 222

x = 222/12

x = 18.5

5x = 5*18.5 = 92.5

7x - 42 = 7*18.5 - 42 = 129.5 - 42 = 87.5