[tex]( {8}^{x} )^{2} \div {16}^{3} = 64[/tex]
[tex] {8}^{2x} \div {16}^{3} = 64[/tex]
[tex] {8}^{2x} \div {2}^{12} = 64[/tex]
[tex] {8}^{2x} \div {2}^{12} = {2}^{6} [/tex]
[tex] {2}^{6x} \div {2}^{12} = {2}^{6} [/tex]
[tex] {2}^{6x - 12} = {2}^{6} [/tex]
[tex]6x - 12 = 6[/tex]
[tex]6x = 6 + 12[/tex]
[tex]6x = 18[/tex]
[tex]x = 3[/tex]