Question

$\frac{3}{17} c+\frac{2}{5}=1$
Ответ: c=

Answer 1

$\displaystyle \frac{3}{17}c+\frac{2}{5}=1\\\\ 15c+34=85\\15c=85-34\\15c-51\\\\ c=\frac{17}{5}=3\frac{2}{5}=3,4$

Answer 2

3/17c=1-1/2
3/17c=3/5
c=(3*17)/(5*3)
c=51/15
c=17/5