Question

допоможіть будь ласка з завданням

Answer 1

$\displaystyle\bf\\\frac{1}{x} =\frac{1}{12}+0,25 \\\\\\\frac{1}{x} =\frac{1}{12}+\frac{1}{4} \\\\\\\frac{1}{x} =\frac{1+3}{12}\\\\\\\frac{1}{x} =\frac{4}{12}\\\\\\\frac{1}{x} =\frac{1}{3} \\\\\\\boxed{x=3}$