Question

7x - 21/5 =3/4 - 4/7 solve the equation​

Answer 1

$\huge{\rm{\boxed{\blue{ Solve:- }}}}$

$7x - \frac{21}{5} = \frac{3}{4} - \frac{4}{7}$

$\huge{\rm{\boxed{\pink{ Solution:- }}}}$

$= 7x - \frac{21}{5} = \frac{3}{4} - \frac{4}{7} \\ = \frac{5(7x) - 21}{5} = \frac{7(3) - 4(4)}{4 \times 7} \\ = \frac{35x - 21}{5} = \frac{21 - 16}{28} \\ = 35x - 21 = \frac{5}{28} \times 5 \\ = 35x = \frac{25}{28} + 21 \\ = 35x = \frac{25 + 588}{28} \\ = 35x = \frac{613}{28} \\ = x = \frac{21.8}{35} \\ = x = 0.62$

Hence,

$\huge\rm{\boxed{ x = 0.62 }}$

#ItzSayan

Answer 2

$\Huge\mathcal\blue{\underbrace{\overbrace{\mid{\red{Answer}}\mid}}}$

Given-

$7x - 21/5 =3/4 - 4/7$

It is also a linear equation in one variable

To Find-

the value of x

Solution-

$7x - 21/5 =3/4 - 4/7$

$= > \frac{7x \times 5}{1 \times 5} - \frac{21}{5} = \frac{3 \times 7}{4 \times 7} - \frac{4 \times 4}{7 \times 4}$

$\frac{35x - 21}{5} = \frac{21 - 16}{28}$

$= > 35x - 21 = \frac{5 \times 5}{28}$

$= > 35x = \frac{5}{28} + 21$

$= > 35x = \frac{5 + 21 \times 28}{28}$

$= > 35x = \frac{5 + 588}{28}$

$= > 35x = \frac{593}{28}$

$= > x = \frac{593}{28 \times 35}$

$= > x = \frac{593}{980}$

$= > x = 0.605$