Question

AJUDAAA PORFAVOR
































c) 5x/2 + 4 = 20
d) 2(x + 5) = 10
e) 3x + 5 = 2x + 10

Answer 1

Resposta:

c) x = 6,4

d) x = 0

e) x = 5

Explicação passo-a-passo:

c)

$\frac{5x}{2} +4=20$

Multiplicando ambos os lados da igualdade por 2:

$5x+8=40\\\\5x=40-8\\\\5x=32\\\\x=32/5\\\\x=6,4$

d)

Simplificando:

$2(x+5)=10\\\\(x+5)=10/2\\\\x+5=5\\\\x=5-5\\\\x=0$

e)

Simplificando:

$3x+5=2x+10\\\\3x-2x=10-5\\\\x=5$

Valeu!