Find the value of x.

21
27
31
34

The two angles are vertical angles, which mean they are the same.

3x + 1  =64

Subtract 1 from both sides:

3x = 63

Divide both sides by 3:

x = 63 / 3

x = 21

step-by-step explanation:

in the absence of parentheses, i will have to make some assumptions:   i interpret your (3x+5/y^6)(4y^3/5)​ to mean:

3x + 5     4y^(3/5)       (3x + 5)(4)

* =

    y^6             1               y^(6-3/5)

if this is not what you expected, repost your question using parentheses to indicate whether you meant

4y^3

    or   4y^(3/5)

    5