Question

Tìm x biết 

a) x-2/3=5/7

b) 5/3x+7/2=2/3

Answer 1

x = 5/7 + 2/3

x = 29/21

 

5/3x = 2/3 - 7/2

5/3x = -17/6

x = -17/6 : 5/3

x = -17/10

Answer 2

a)\(=>x=\dfrac{5}{7}+\dfrac{2}{3}=\dfrac{29}{21}\)

b)\(=>x=-\dfrac{17}{6}:\dfrac{5}{3}=-\dfrac{17}{10}\)

Answer 3

a)x-2/3=5/7

=) x=5/7+2/3

=) x= 29/21

b)5/3x+7/2=2/3

=) 5/3x=2/3-7/2

=)5/3x=-17/6

=)x=-17/6:5/3

=)x=-17/10