$$\left. \begin{array} { l } { 4 \times 4 + ( x \times 3 ) = 7 ( 4 + 6 ) \quad ( i i ) ( 9 \times 8 ) + ( 8 \times 8 ) = ( 9 + 8 ) \times x } \end{array} \right.$$
$x=-1664$
$$16+x\times 3=7\left(4+6\right)i\times \left(9i\right)\times 8+8\times 8$$
$$16+x\times 3=7\times \left(10i\right)\times \left(9i\right)\times 8+8\times 8$$
$$16+x\times 3=70i\times \left(9i\right)\times 8+8\times 8$$
$$16+x\times 3=-630\times 8+8\times 8$$
$$16+x\times 3=-5040+8\times 8$$
$$16+x\times 3=-5040+64$$
$$16+x\times 3=-4976$$
$$x\times 3=-4976-16$$
$$x\times 3=-4992$$
$$x=\frac{-4992}{3}$$
$$x=-1664$$
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