Answer:
C
Step-by-step explanation:
Given
Required
We have:
This gives:
Open bracket
Collect like terms
3/10 simplified
120/400 simplified is 3/10 (divide both numbers by 40).
BC×AD=K
CKD= 180-32-79= 2x +180- 5x
-> x = (-32-79) : (-3) =37