Question

(2x-21)+x=180 Find the value of x with a 180 degree line

Answer 1

x = 67

Explanation:

2x - 21 + x = 180 Add like terms

3x - 21 = 180 Add 21 to both sides

3x - 21 + 21 = 180 + 21

3x = 201 Divide by 3

x = 67