Question

Решить уравнение 72 / 80 - x - 12/80 равно 15/80 ​

Answer 1

$x = \dfrac{9}{16} = 0.5625$

$\displaystyle \frac{72}{80} - x -\frac{12}{80} = \frac{15}{80} \\\\\\\bigg(\frac{72}{80} - \frac{12}{80}\bigg) - x = \frac{15}{80} \\\\\\\frac{60}{80} - x = \frac{15}{80} \\\\\\x = \frac{60}{80} - \frac{15}{80} \\\\\\x=\frac{45}{80} \\\\\\x = \frac{9}{16} \\\\\\x=0.5625$