Question

how can i solve this equation , is it an idenity or not ?: 15q-3(4q-6)=3q 9-9q

Answer 1

15Q-12Q-18=-6Q+9
3Q-18=-6Q+9
+6Q     +6Q
9Q-18=9
     +18  +18


9Q=27
/9    /9

Q=3

Answer 2

15q - 3 (4q - 6)=3q + 9 - 9q

15q - 12q + 18 = 3q + 9 - 9q

3q + 18 = -6q + 9             Hint: subtract 3q and -6q

18 = -9q + 9                     Hint: add -9 + 9= -18

=18 /-18q                      

= -1q