Question

a)10×+20<30
b)5x+1O > 30
c) 4x-10<70
d) 10000×< 500000
e)x+x+X+x+x=100
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Answer 1

Resposta:

a) 10x + 20 < 30

10x < 30 - 20

10x < 10

x < 10/10

x < 1

b) 5x + 10 > 30

5x > 30 - 10

5x > 20

x > 20/5

x > 4

c) 4x - 10 < 70

4x < 70 + 10

4x < 80

x < 80/4

x < 20

d) 10.000x < 500.000

x < 500.000/10.000

x < 50

e) x + x + x + x + x = 100

5x = 100

x = 100/5

x = 20

espero ter ajudado!