Question

Si (X+31)/2=-5/9(28-x) ¿Cuánto vale x?

Answer 1

Resolver.

(x + 31)/2 = - 5/9(28 - x)

(x + 31)/2 = - 5 - 5x/9

x + 31 = 2(- 5 - 5x/9)

x + 31 = - 10 - 10x/9

x/1 + 10x/9 = -10 - 31
 
(9x + 10x)/9 = - 41
  
19x/9 = - 41

19x = - 41(9)

19x = - 369
 
    x = - 369/19