gokuss05alex gokuss05alex
  • 01-05-2021
  • Mathematics
contestada

[tex]38+7·(x-3)=9·(x+1)[/tex]

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Аноним Аноним
  • 01-05-2021

[tex]38 + 7x - 21 = 9x + 9[/tex]

Combine like terms.

[tex]17 + 7x = 9x + 9[/tex]

Eliminate a x.

[tex]17 = 2x + 9[/tex]

[tex]8 = 2x[/tex]

[tex]x = 4[/tex]

Answer Link
hnori22003
hnori22003 hnori22003
  • 01-05-2021

38 + 7x - 21 = 9x + 9

7x + 17 = 9x + 9

Subtract both sides 9

7x + 17 - 9 = 9x + 9 - 9

7x + 8 = 9x

Subtract sides 7x

7x - 7x + 8 = 9x - 7x

8 = 2x

Divide both sides by 2

8 ÷ 2 = 2x ÷ 2

x = 4

Answer Link

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