12a + 6b + 9a + 14b =(12a + 9a) + (6b + 14b) =21a + 20b
The GCF is 6b.
a = 6b = 9a + b = 6 + 9 = 15
The GCF is 9a.
The GCF is a.
The GCF is 6.
-6b =15 -6b/-6 = 15/-6 b = -2.5
-21 = 9a - 15 - 3a -6 = 6a -1 = a
It is 6*(b + 4)
Collect like terms: 9a -7a = 9 - 15, ie 2a = -6, so a = -3
18b and 24b are both divisible by 6 and they both have b so its 6b
3(g + 6b + 3r)