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Q: What is 9a plus 2b - 8a -3b?

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1a

9a + 3b - 11a - 4b = -2a -b

9a + 7b *remember to look and understand the letters!*

9a - 8a = a

12

3(3a+b)

6 is the average of 2a and a - 2b so 12 = 2a + a - 2b = 3a - 2b3 is the average of 2a - b and 4a + 3b so 6 = 2a - b + 4a + 3b = 6a + 2bAdding the two equations gives: 18 = 9a so that a = 2Substituting for a in the first gives 12 = 6 - 2b so that b = -36 is the average of 2a and a - 2b so 12 = 2a + a - 2b = 3a - 2b3 is the average of 2a - b and 4a + 3b so 6 = 2a - b + 4a + 3b = 6a + 2bAdding the two equations gives: 18 = 9a so that a = 2Substituting for a in the first gives 12 = 6 - 2b so that b = -36 is the average of 2a and a - 2b so 12 = 2a + a - 2b = 3a - 2b3 is the average of 2a - b and 4a + 3b so 6 = 2a - b + 4a + 3b = 6a + 2bAdding the two equations gives: 18 = 9a so that a = 2Substituting for a in the first gives 12 = 6 - 2b so that b = -36 is the average of 2a and a - 2b so 12 = 2a + a - 2b = 3a - 2b3 is the average of 2a - b and 4a + 3b so 6 = 2a - b + 4a + 3b = 6a + 2bAdding the two equations gives: 18 = 9a so that a = 2Substituting for a in the first gives 12 = 6 - 2b so that b = -3

9a-a = 19+7a 8a = 19+7a 8a - 7a = 19 + 7a - 7a 1a = 19 a = 19

If: 9a = 18b Then: a = 2b

13

3a + 4b - (-6a) - 3b? There is no equivalent because you did not make it an equality. However you could combine the numbers... 3a + 4b +6a -3b = 9a + 1b

2a+5a+9a = 16a

(9a + 2)(9a + 2)

12a + 6b + 9a + 14b =(12a + 9a) + (6b + 14b) =21a + 20b

a2+9a+20 = (a+4)(a+5) when factored

9a+21 3(3a+7)

There is nothing you can do to 9a + 5 without knowing the value of a.

The simplified expression is -9a -9b.

That cannot be simplified any further so it is: 9a + 45z

9a + 1

-14 + 9a = 389a = 52a = 52/9 or 5.78

2 + 3A + 9A = 2 + 12AThe numerical value depends on the value of 'A'.It changes whenever 'A' changes.

9a +8 -2a -3 -5a = 2a +5

a= -0.8

Collect like terms: 9a -7a = 9 - 15, ie 2a = -6, so a = -3