Question

What is solution to 49^x=sqrt7^(2x+6)

Answer 1

try
\[2x=\frac{1}{2}(2x+6)\]

Answer 2

since
\[49=7^2\] and
\[\sqrt{7}=7^{\frac{1}{2}}\]

Answer 3

7^2x=7^(x+3)
2x=x+3
x=3