Question

qual o valor de x ?

5.(-x+9)+10=0

Answer 1

Olá!!!

Resolução!!

5 • ( - x + 9 ) + 10 = 0
5 • ( - x ) + 5 • 9 + 10 = 0
- 5x + 45 + 10 = 0
- 5x + 55 = 0
- 5x = - 55 • ( - 1 )
5x = 55
x = 55/5
x = 11

S = { 11 }

Espero ter ajudado!!

Answer 2

Simples:

-5x + 45 + 10 = 0 .(-1)

5x = 45 + 10

5x = 55

x = $\frac{55}{5}$ = 11

x = 11