Answer:
x=5
Step-by-step explanation:
First, let's understand logarithms.
When there is no base given, like in this problem's right side of the equation, the base is automatically 10.
So, let's re-write that.
[tex]\frac{7}{x+2}=log_{10}x+5[/tex]
Now, let's test a few of the numbers out. For brevity, I already know it's 3. Let's show you why.
[tex]\frac{7}{5+2} =log_{10}(5+5)\\\frac{7}{7} = log_{10}(10)\\1 = 1[/tex]
