Answer:
Hi! so the answer is- Yes, variables have to be on the left ' AND ' Yes, constants have to be on the left.
Step-by-step explanation:
Hope i helped!
x = 30
m<E = [m(arc)AD - m(arc)BC]/2
50 = (130 - x)/2
100 = 130 - x
-x = -30
About 4.2426
Use cross multiplication
