Find the value of x such that

$2-3x=\frac{1}{12}+\frac{10}{7}$

Find the value of expression such that:

$\frac{1}{1\times 20}+\frac{1}{2\times 30}+\frac{1}{3\times 40}$ = ….. ?

Calculate:

$\frac{3}{2\times 5}+\frac{3}{5\times 8}+\frac{3}{8\times 11}$ = ….. ?

Find the two fractions so that the sum of them equal $\frac{5}{6}$ and the difference of two fractions equal $\frac{1}{6}$ ?

( Write the answer as a/b )

Let fraction $\frac{28}{35}$ . If both denominator and numerator of this fraction are decreased by x units then this fraction will equal $\frac{3}{4}$ . The value of x is …….. ?

The numeratorand the denominator of a fraction ( smaller than 1 ) are two consecutive odd numbers by sum is 32. Find the fraction ?

Find a fraction, know that denominatoris 42 units more than numerator . The sum of denominator and the  numerator is 88 ?

Let fraction $\frac{c}{d}$ . If  reducing a fracion $\frac{c}{d}$, this fraction will equal $\frac{2}{5}$. If numerator is decreased by 12 units then reducing this fraction, this fraction will equal $\frac{4}{25}$. Find fraction $\frac{c}{d}$? ( Write answer as a/b )

Let fraction $\frac{67}{33}$. If both denominator and numerator of this fraction are increased by m units to become a new fraction then  reducing this fraction , this fraction will equal $\frac{5}{3}$. Find m?  

Let fraction $\frac{18}{43}$.If denominator  is decreased by x units and numerator is no change , this fraction will equal $\frac{3}{4}$. Find the value of x ?

Let fraction $\frac{a}{b}$ . If  reducing a fracion $\frac{a}{b}$, this fraction will equal $\frac{3}{7}$. If denominator  is decreased by 7 units and numerator is no change , then reducing this fraction, this fraction will equal $\frac{3}{8}$. Find fraction $\frac{a}{b}$? ( Write answer as a/b ) 

Let fraction $\frac{21}{57}$. If denominator  is decreased by x units and numerator is no change , this fraction will equal $\frac{3}{4}$. Find the value of x ?

Let fraction $\frac{31}{60}$. If numerator  is decreased by a units and denominator is no change , this fraction will equal $\frac{3}{5}$. Find the value of a?

Let fraction $\frac{45}{67}$. If numerator  is decreased by a units and denominator is increased a units then reducing this fraction, this fraction will equal $\frac{3}{5}$. Find the value of a?

Let fraction $\frac{54}{36}$. If numerator  is decreased by a units and denominator is increased a units then reducing this fraction, this fraction will equal $\frac{4}{5}$. Find the value of a?