$a)\frac{x+1}{5}=k\mid \cdot 5$

$x+1=5k\mid -1$

$x=5k-1$

 

$b)\frac{x}{5}=\frac{a}{6}\mid \cdot 5$

$x=\frac{5a}{6}$

 

 

$c)\frac{1}{x}=\frac{2}{c}x\ne 0c\ne 0$

$\frac{1}{x}=\frac{2}{c}\mid \cdot x$

$1=\frac{2x}{c}\mid \cdot c$

$c=2x\mid :2$

$\frac{c}{2}=x$

$x=\frac{c}{2}$

 

 

$d)\frac{2x}{c}=\frac{d}{5}c\ne 0$

$\frac{2x}{c}=\frac{d}{5}\mid \cdot c$

$2x=\frac{d\cdot c}{5}\mid :2$

$x=\frac{cd}{10}$

 

 

$e)\frac{x}{a}=\frac{b}{c}a\ne 0c\ne 0$

$\frac{x}{a}=\frac{b}{c}\mid \cdot a$

$x=\frac{ab}{c}$

 

 

$f)\frac{35d}{x}=\frac{5b}{d}\mid \cdot x$ $35d=\frac{5b}{d}\cdot x\mid \cdot d$  

$35d^2=5bx\mid :5b$  

$\frac{35d^2}{5b}=x$  

$x=\frac{35d^2}{5b}$