Question

Find the value of x.

Answer 1

x=58

Explanation:

angles in a quadrilateral add up to 360.

1) form an equation

2x+x+50+x+x+20=360

2) collect the like terms

5x+70=360

3) solve the equation

5x=360-70

5x=290

x=58

Answer 2

Explanation:

Sum of all angles of quadrilateral is 360

x + 2x + x + 50 + x + 20 = 360

Bring together the like terms

x + 2x + x + x + 50 + 20 = 360

5x + 70 = 360

5x = 360 - 70

5x = 290

x = 290/5

x = 58°