danielgutierres911 danielgutierres911

16-09-2020
Mathematics

contestada

Find the value of x in the equation 13 - X =21

Respuesta :

CSMedrano CSMedrano

16-09-2020

Answer:

x=-9

Step-by-step explanation:

[tex]13-x=21\\\\12-x+x=21+x\\\\12+0=21+x\\\\21+x=12\\\\21-21+x=12-21\\\\0+x=-9\\\\x=-9[/tex]

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altyfaultyfacility altyfaultyfacility

16-09-2020

Answer:

- 8

Step-by-step explanation:

13 - x = 21

-x = 8 Subtract 13 from both sides

x = -8 Divide both sides of -1 since x still has a negative.

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