Answer:

Step-by-step explanation: Since the triangles are similar, line them up so that the equivalent angle is in the same spot on both triangles. In triangle JKL the 12 represents the same side on QRS being 20. This means that triangle QRS's sides are 5/3 greater than the other triangle. To solve for x, set up the equation based on the similar sides and it is,

which means that

then

lastly,
