Q: How do you solve -21 equals 9a-15-3a?

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A + 9 = 21 A = 21 - 9 A = 12

0.5x=18 x=36

-30x=6.3 x=-.21

5

3x-6 = 21 3x = 21+6 x = (21+6)/3 x = 9 You shouldn't ask us to solve your math homework.

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A + 9 = 21 A = 21 - 9 A = 12

-9

32

0.5x=18 x=36

-30x=6.3 x=-.21

5

3x-6 = 21 3x = 21+6 x = (21+6)/3 x = 9 You shouldn't ask us to solve your math homework.

depends what 'a' =

This is the same as: 13-2b = 21 -2b = 21-13 -2b = 8 b = -4

-21

-3

3m-5 = 7-21 3m = 7-21+5 3m = -9 m = -3