Q., ( 10y – 9 + 7n ) + ( 8 – 9n – y ), ..

6 sec read


Q.

( 10y – 9 + 7n ) + ( 8 – 9n – y )

..​

Penjelasan dengan langkah-langkah:

( 10y – 9 + 7n ) + ( 8 – 9n – y )

= ( 10y + ( – y )) + ( – 9 + 8 ) + ( 7n + ( – 9n ))

= 9y 1 2n


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