Could someone please help me with these two questions (photo included)

Answer:
7) m<SCA= 3x+3=90°
(since all the angles of a square are right angle)
=>3x=87°
=>x= 29°
8)Opposite angles of a rhombus have equal measure.
So, half of opposite angles of a rhombus have equal measure .
m<1=m<4=37