Question

Please help lol. Thanks.

Answer 1

the choice A = 15

Explanation:

`4x + (4x + 42) + (2x - 12) = 180 \\ \\ 4x + 4x + 2x + 42 - 12 = 180 \\ 10x + 30 = 180 \\ 10x = 180 - 30 \\ 10x = 150 \\ \\ x = (150)/(10) \\ \\ x = 15`

I hope I helped you^_^

Answer 2

4x+2x-12+4x+42.

ALL interior angles of a triangle ADD up to 180 degrees.

4x+2x-12+4x+42 = 180

add LIKE terms

10x+30 = 180

subtract 30 from both sides

10x = 150

divide both sides by 10

x = 15

Explanation: