LAST ATTEMPT IM MARKING AS BRAINLIEST!! (Finding missing sides- similar triangles Algebraic practice )

x=3

Step-by-step explanation:

What u should always do is look at the letters of the triangles given:

It will tell u that:

Now we once again just sub in the values:

we can simplify the fraction on the right

And now we cross multiply

3×20=4(4x+3)

60=16x+12

60-12=16x

48=16x

Therefore :

x=3