Question

Preencha as lacunas para resolver 5+68 ( 15 pontos)
5+68
= (3+____) + 68
= 3+ (_____) 68
= 3+ ____
=____

Answer 1

Resposta:

Basta transformar as expressões em equações. Logo:

a)

$5+68 = (3+ x ) + 68\\5=3+x+68-68\\5=3+x\\x = 5-3\\x = 2$

b)

$5+68 = 3 + (x) 68\\5+68 = 3 + 68x\\68x + 3 = 73\\68x = 73 -3\\68x = 70\\x= 70/68\\x= 35/34\\x= 1.029$

c)

$5+68 = 3 + x\\x = 68 + 5 - 3\\x = 68 + 2\\x = 70$

d)

$5+68 = x\\x = 73$