3 years ago

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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