Q: If 3b plus 9 12then b?

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(a+b)(3b+1)

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

3b

8b + 11 - 3b = 2b + 2 5b + 11 = 2b + 2 5b - 2b = 2 - 11 3b = -9 b = -3

8a+b+32a+3b=40a+4b

2A plus 3B times 2A - 3B = 4A2 - 9B2; this is an example of the general formula (a + b)(a - b) = a2 - b2.

(2a + b)(a + 3b)

6

This expression can be factored. ab + 3a + b2 + 3b = a(b + 3) + b(b + 3) = (a + b)(b + 3)

-3b=96+b -4b=96 b=-24

3a+ax+3b+bx = 3(a+b)+(a+b)x = (a+b)(3+x)

It is: b+b+b = 3b