Respuesta :

MegH07
x = 11

The angle is a right angle so it is 90 degrees, but the one angles is 20, so the other one is 70. 

70 - 15 = 55
55 / 5 = 11
11 * 5 = 55 + 15 = 70 + 20 = 90

x = 11
Right angles are 90 degrees. 
90 - 20 = 70. 70 = the other side of the line. 
5 times x plus 15 has to equal 70.

x=11

Hope I helped!