Question

qual o valor de x na equação 3x+ 4 + x = x + 4
a) x = 3
b) x = 0
c) x = 4
d) x = 8/3​

Answer 1

Resposta:

$3x+4+x=x+4\\3x+x-x=4-4\\3x=0\\x=\frac{0}{3}\\x=0$

P.R.: $3.0+4+0=0+4\\0+4+0=4\\4=4$