Verified answer

Пошаговое объяснение:

[tex]1) \: \dfrac{ {7}^{12} }{2x - 3} = {7}^{8} \\ {7}^{12} = {7}^{8} (2x - 3) \: ( \div \: {7}^{8} ) \\ 2x - 3 = {7}^{4} \\ 2x = 2401 + 3 \\ 2x = 2404 \\ x = \dfrac{2404}{2} \\ x = 1202.[/tex]

[tex] 2) \: \dfrac{ {4}^{16} }{0.1x + 1.3} = {4}^{10} \\ {4}^{16} = {4}^{10} (0.1x + 1.3) \: ( \div \: {4}^{10} )\\ 0.1x + 1.3 = {4}^{6} \\ 0.1x = 4096 - 1.3 \\ 0.1x = 4094.7 \\ x = \frac{4094.7}{0.1} \\ x = 40947.[/tex]

[tex]3) \: {3}^{3} (191 - 2x) = {3}^{6} \: ( \div \: {3}^{3} ) \\ 191 - 2x = {3}^{3} \\ - 2x = 27 - 191 \\ - 2x = - 164 \\ x = \dfrac{ - 164}{ - 2} \\ x = 82.[/tex]

[tex]4) \: {25}^{2} (10x + 6.1) = {25}^{4} \: ( \div \: 25 {}^{2} ) \\ 10x + 6.1 = 25 {}^{2} \\ 10x = 625 - 6.1 \\ 10x = 618.9 \\ x = \frac{618.9}{10} \\ x = 61.89.[/tex]