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Q: What is the answer to 6 plus 3b equals -18?

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20+3b = 20 + 3(-6) = 20-18 = 2

If a plus b equals 6 what is the value of 3a plus 3b

3b + 6 = 12 3b = 6 b = 2

6

b = -6

12a + 6b + 6c = 6(2a + b + c)

6+7a+6b

3b + 2a = 2 and -2 + a = 8 -2 + a = 8 can be rearranged to show a = 8 + 2 = 10 (Effectively 2 has been added to both sides.) As a = 10, the value for a can now be substituted in the equation 3b + 2a = 2 3b + 2x10 = 2 : 3b + 20 = 2 this can be rearranged to show 3b = 2 - 20 = -18 and dividing both sides by 3 gives b = -6.

-6(a-3b-9c)

18

It is: 4b+6

18 + (-6) = 12

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