Question

9 в -2 степени × 3 в степени х+4=27

Answer 1

${9}^{ - 2} times {3}^{x + 4} = 27 \ {3}^{ - 4} times {3}^{x + 4} = {3}^{3} \ {3}^{ - 4 + x + 4} = {3}^{3} \ {3}^{x} = {3}^{3} \ x = 3$