Respuesta :

Unknownzzzz

Answer:

6

Step-by-step explanation:

X=21-15

=6

to find X, u need to put 15 with the 21.... the 15 have to cross over the = sign.

Take note: when u cross over, u need to change the sign

HotCupid

Step-by-step explanation:

[tex]{ \huge \fbox \pink {A}\fbox \blue {n} \fbox \purple {s} \fbox \green{w} \fbox \red {e} \fbox \orange {r}}[/tex]

=> X+ 15= 21

=> x= 21- 15

=> 6

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