Answer: a=10
Step-by-step explanation:
The given proportion: [tex]\frac{3}{5}=\frac{a+5}{25}[/tex]
To determine the value of a in the given proportion , we need to multiply 25 on both the sides, we get
[tex]\frac{25\times3}{5}=\frac{25\times(a+5)}{25}\\\\\Rightarrrow 15=a+5[/tex]
Now, subtract 5 on both the sides, we get
[tex]\\\\\Rightarrrow10=a\ or\ a=10[/tex]
Hence, the value of x =10.