Question

решите уранение
5х = (5/7)^2
4х = -(4/5)^2
-0,1х = 10^3
0,3х = -10^2 ​

Answer 1

$1) 5x= (\frac{5}{7} )^{2}\\\\x = \frac{25}{49} : \frac{5}{1} \\\\x = \frac{5}{49} \\\\2) 4x = -(\frac{4}{5} )^{2}\\\\x = - \frac{16}{25} :\frac{4}{1}\\\\x = -\frac{4}{25} \\\\3) -0,1х = 10^{3}\\ -0,1x = 1000\\x = -1000 : 0,1\\x = -10000\\\\4) 0,3x = (-10)^{2}\\0,3x = 100\\x = 100 : 0,3\\x = 1000 : 3\\ x = 333\frac{1}{3}$