Answer:
x = 64/3 = 21 1/3
Step-by-step explanation:
Corresponding sides of similar triangles are proportional. The length of the bottom side is 12+6 = 18, so the proportion can be written ...
x/12 = 32/18
x = 12(16/9) . . . . multiply by 12, simplify the fraction 32/18
x = 64/3 = 21 1/3
