Question

What should be added to twice the rational number -7/3 to get 3/7

Answer 1

Hi there !

here's your answer

let the number be x

it is given, twice the number-7/3

$which \: is \: 2 \times \frac{ - 7}{3} = \frac{ - 14}{3}$
so,

$x + \frac{ - 14}{3} = \frac{3}{7}$

$x - \frac{14}{3} = \frac{3}{7}$

$x = \frac{3}{7} + \frac{14}{3}$

$x = \frac{9 + 98}{21}$

$x = \frac{107}{21}$

so,

107/21 must be added

Answer 2

let X be any rational number
7/3+2x=3/7
2x=3/7+7/3
2x=9+49/21
X=58/21*2
X=29/21