Question

Can someone please help me figure out how to solve for x?​

Answer 1

Answer:

$x=30$

Step-by-step explanation:

Both triangles in this figure are similar. Therefore, we can set up the following proportion:

$\frac{21}{x}=\frac{14}{20}$.

Cross-multiply to solve:

$14x=21\cdot 20,\\x=\frac{21\cdot20}{14},\\x=\fbox{ 30 }$.