Question

x^7 = 16^14
x^4=5^12

Answer 1

${x}^{7} = {16}^{14} = ({16}^{2} {)}^{7} = {256}^{7} \\ x = 256$

${x}^{4} = {5}^{12} = ({5}^{3} {)}^{4} = {125}^{4} \\ x = 125 \\ x = - 125$