Question

resolva as equaçoes:
a)20x-30=40+30-20
b)3x-10+13=-2x+28
c)10x-20=40+50
d)13x-23-45=-7x+12​

Answer 1

Resposta:

A) 20x = 40 + 30 - 20 + 30

20x = 80

X = 80 : 20 {Simplifica os zeros e ficar só com 8 : 2}

X = 4

B) 3x + 2x = 28 + 10 - 13

5x = 25

X = 25 : 5

X = 5

C) 10x = 40 + 50 + 20

10x = 110

X = 110 : 10 { simplificar os zeros}

X = 11

D) 13x + 7x = 12 + 23 + 45

20x = 80

X = 80 : 20 { simplificar os zeros}

X = 4