Answer:
Option a - [tex]a=\frac{2A}{h}-b[/tex]
Step-by-step explanation:
Given : Expression [tex]A=\frac{a+b}{2}\times h[/tex]
To find : Solve for a ?
Solution :
Step 1 - Write the expression,
[tex]A=\frac{a+b}{2}\times h[/tex]
Step 2 - Multiply by 2 both side,
[tex]2A=a+b\times h[/tex]
Step 3 - Divide by h both side,
[tex]\frac{2A}{h}=a+b[/tex]
Step 4 - Subtract by b both side,
[tex]\frac{2A}{h}-b=a[/tex]
Therefore, [tex]a=\frac{2A}{h}-b[/tex]
So, Option a is correct.
