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vaieri [72.5K]
3 years ago
5

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

Mathematics
2 answers:
SOVA2 [1]3 years ago
8 0

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.

gizmo_the_mogwai [7]3 years ago
3 0

Answer:

x=-9

Step-by-step explanation:

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

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