$$D=8\div4(13.x(21-5)$$
$D=416x$
$$D=8\div 4\times 13x\times 16$$
$$D=8\div 4\times 208x$$
Show Solution
Hide Solution
$x=\frac{D}{416}$
$$8\div 4\times 208x=D$$
$$416x=D$$
$$\frac{416x}{416}=\frac{D}{416}$$
$$x=\frac{D}{416}$$
