Q: What is the answer for 3A equals 21?

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3a - 7 = -28 Therefore, 3a = -21 a = -21/3 Therefore, a = -7

-21 = 9a - 15 - 3a -6 = 6a -1 = a

a = 3

9a+21 3(3a+7)

depends what 'a' =

y = (3 X 8) - 5 = 21.

3a=1divide both sides by 3a=1/3

-3a-12 = 12+12 +12-3a = +12~ ~-3 -3a = -8

3a = 1a = 1/3 (a third)

a = -5

If a + b = 6, what is the value of 3a + 3b?

-3(a^2 - 3a + 7)