help me please!!!! i don't understand

Answer:
x=20 degrees
Step-by-step explanation:
IAK=BAC because vertical angles th.
ACB=GCJ because vertical angles th.
We are given that ABC is 90 degrees.
The sum of the angles in a triangle is 180 degrees.
We know that ABC is a triangle, and x+90+70=180
x+160=180 degrees
x=20 degrees