Question

Hallar el valor de la incógnita
A) 2x + 3 = 21-7x
B) 27-9 x = -3

Answer 1

A) 2x + 3 = 21-7x

 2x+7x= 21-3

 9x=18

 x=18/9

 x=2

B) 27-9 x = -3

 -9x=-3-27

 -9x=-30

 x=-30/-9

 x=10/3