Question

7x-23
2x + 11
3(x+2)

Answer 1

Answer: x=31/2

Explanation:

7x-23 + 2x + 11 + 3(x+2) = 180 ==>3 angles of triangle add up to 180 degrees

7x-23 + 2x + 11 + 3x+6=180

7x+3x+2x+11+6-23=180

10x+2x+17-23=180

12x-6=180

12x-6+6=180+6

12x=186

x=186/12

x=31/2