Question

3_ resolva:
a) 5x+=1025
b) 2x+18=60
c) 3x+15=45
d)5x+14=3x+70
e) 3x-8=2x+20
f) 2x+22=308

Answer 1

Resposta:

a) 5x = 1025

x = 1025/5

x = 205

b) 2x + 18 = 60

2x = 60 - 18

2x = 42

x = 42/2

x = 21

c) 3x + 15 = 45

3x = 45 - 15

3x = 30

x = 30/3

x = 10

d) 5x + 14 = 3x + 70

5x - 3x = 70 - 14

2x = 56

x = 56/2

x = 28

e) 3x - 8 = 2x + 20

3x - 2x = 20 + 8

x = 28

f) 2x + 22 = 308

2x = 308 - 22

2x = 286

x = 286/2

x = 143

espero ter ajudado.