$${log7}{\left({\mathtt{5}}{\mathtt{\,-\,}}{\mathtt{4}}{\mathtt{\,\times\,}}{\mathtt{x}}\right)} = {\mathtt{2}}$$
****7 is the base
log7 (5 - 4x) = 2
Exponentially, this says that
7^2 = 5 - 4x
49 = 5 - 4x rearrange as
4x = 5 - 49
4x = -45 divide both sides by 4
x = -45/4
