Seudónimo Seudónimo
  • 04-04-2015
  • Mathematics
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72 - (blank) + 20 = 70 what number is the blank

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iloveonedirection
iloveonedirection iloveonedirection
  • 04-04-2015
[tex]72-x+20=70 \\ \\ 92-x=70 \\ \\ -x=-22 \\ \\ x=22 \\ \\ blank=22[/tex]
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Аноним Аноним
  • 05-04-2015
[tex]72-x+20=70 \\ -x+92=70 \\ -x+92-92=70-92[/tex]

Divide both sides by -1

[tex] \frac{-x}{-1} = \frac{-22}{-1} =22[/tex]
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