Substitute 4 into $$x$$
So what we would get is:
$$\left({\mathtt{4}}{\mathtt{\,\times\,}}{\mathtt{4}}\right){\mathtt{\,-\,}}{\mathtt{7}} = {\mathtt{9}}$$
The answer is 9
Substitute 4 into $$x$$
So what we would get is:
$$\left({\mathtt{4}}{\mathtt{\,\times\,}}{\mathtt{4}}\right){\mathtt{\,-\,}}{\mathtt{7}} = {\mathtt{9}}$$
The answer is 9