Question:
3h+sqrt.2=sqrt.5
Answer:
h=sqrt.5-sqrt.2/3 (the very last option)
Method:
You have to get h on its own so you start by subtracting sqrt.2 on both sides, you subtract because you have to reverse the original symbol (+ becomes -, ^2 becomes sqrt., * becomes /, and the other way around, etc.), once you do that you have to divide by 3 on both sides and you get your answer.
Visual:
1. 3h+sqrt.2=sqrt.5
-sqrt.2 -sqrt.2
2. 3h=sqrt.5-sqrt.2
/3 /3
3. h=sqrt.5-sqrt.2 /3
Hope this helps!