[tex]( {2}^{5} \times {(2 \times 3)}^{7} ) \div {3}^{7} = {2}^{x} \\ ( {2}^{5} \times {2}^{7} ) \div {3}^{7} = {2}^{x} \\ ( {2}^{12} \times {3}^{7} ) \div {3}^{7} = {2}^{x} \\ 32 \times {2}^{7} = {2}^{x} \\ {2}^{5} \times {2}^{7} = {2}^{x} \\ 5 + 7 = x \\ x = 12[/tex]
