Question

решите  уравнение  25х-2 23=215

Answer 1

$frac{2}{5x} -2 frac{2}{3} - frac{2}{15} =0; frac{6-40x-2x}{15x} = 0; left { {{6-42x=0} atop {15x neq 0}} right. ; 6-42x=0; 42x=-6 ; x=-7$