Question

rezolvati ecuatiile: a si b

Answer 1

$a) {2}^{5x - 4} = {2}^{11}$

$5x - 4 = 11$

$5x = 11 + 4$

$5x = 15 \: | \div 5$

$x = 3$

$b) {7}^{3x + 5} = {7}^{x + 9}$

$3x + 5 = x + 9$

$3x - x = 9 - 5$

$2x = 4 \: | \div 2$

$x = 2$