Question

20)Resolva as equações do 1° grau

a)3x-1/5=4

b)x+9/9=1

c)4x+3/5=1

d)8x-5/2=9

Answer 1

Olá!

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Resolução,

A) 3x - 1/5 = 4

15x/5 - 1/5 = 20/5

15x - 1 = 20

15x = 21

x = 21/15

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B) x + 9/9 = 1

x + 1 = 1

x = 0

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C) 4x + 3/5 = 1

20x/5 + 3/5 = 5/5

20x + 3 = 5

20x = 2

x = 2/20 = 1/10

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D) 8x - 5/2 = 9

16x/2 - 5/2 = 18/2

16x - 5 = 18

16x = 23

x = 23/16

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Abraços! ☯