Answer:
Step-by-step explanation:
The opposite side is equal
The opposite side of two straight intersecting lines are parallel
Therefore.
(3x+1)=64
3x+1 =64
Subtract 1 from both side
3x+1-1=64-1
3x=63
Divide both side 3
x=63/3
x=21
The value of x is 21.
