X=9 mark as brainlest if this helps ;)
X=20*8.15/6.25 this will give you your answer
Answer:26
Hope this helps!

SOLVE FOR X IN THE DIAGRAM
SUM OF ALL ANGLES ON STRAIGHT LINE IS 180°

ANGLES :- 5x , (x+54°),90


Answer:
-6
Step-by-step explanation:
Add the positive numbers first which is nine then add a negative like -8 and you get then add -7 which is -6