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Tems11 [23]
3 years ago
8

X+8=21 I need helpppp

Mathematics
2 answers:
Mrac [35]3 years ago
8 0
You add 13 and 8 it gets 21 so for X its 13
oksano4ka [1.4K]3 years ago
3 0
X = 13.

Because you want x by itself, to need to remove the +8. So, you must do the opposite to BOTH sides. The opposite of +8 is -8, and 21-8=13. Therefore​, x=13.
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