Question

1)Resolva as equações do 1° grau:
a) 5x - 3x = 30
d) 3x – 10 = 45
b) 6x – 12 = 48
e) 7x + 12 = 4x + 18
c) 4x + 20 = 2x + 64
f) 5x – 10 = 40​

Answer 1

Resposta:

Explicação passo-a-passo:

a) 5x-3x= 30=> 2x= 30=> x= 30/2= 15

d) 3x-10=45=> 3x= 45+10=> 3x= 55=> x=55/3

b) 6x-12=48=> 6x= 48+12=> 6x= 60

x= 60/6= 10

e) 7x+12= 4x+18

7x-4x= 18-12=> 3x= 6=> x= 6/3=2

c) 4x+20= 2x+64=> 4x-2x= 64-20=>

2x= 44=> x= 44/2= 22

f) 5x-10=40=> 5x= 40+10=> 5x=50=> x= 50/5= 10