Answer:
x = 18
Explanation:
Since these triangles are similar, we can set up the following proportion:
![(8+12)/(12) = (30)/(x)](https://img.qammunity.org/2023/formulas/mathematics/high-school/zhseubk5z58b76kicmy74h2q8gw1pu4fms.png)
![(20)/(12) = (30)/(x)](https://img.qammunity.org/2023/formulas/mathematics/high-school/qvey8eb223la6if24a39apmum2g386ow5z.png)
Cross multiply:
20x = 360
Divide:
x = 18
Check our work:
We can check our work by plugging 18 back into the proportion and seeing if it makes sense:
![(20)/(12) = (30)/(18)\\\\(20)/(12) = 1(2)/(3)\\\\(30)/(18)= 1(2)/(3)](https://img.qammunity.org/2023/formulas/mathematics/high-school/5zfc4zcai8qdao090en4y8yqfk0ms4hy0s.png)
It works ✓
Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)
- Heather