b = 21
No. 7b - 2b = 5b
(ab/b) / (4a/5b) =(ab / b) * (5b / 4a) = (5ab2 / 4ab)= 5 / (4b)
5b + 21b = 1226b = 1226 26b = 12/26
10a+7b undefined variables cannot be determined
5b + 5b = 2 x 5b
The GCF is 5b.
2a+5b isn't possible the answer is still 2a+5b.
5b-15 = -10
5b-32
5b
15 = 5b
3a + (3b - 2a) + 5b =3a + 3b - 2a + 5b =(3a - 2a) + (3b + 5b) =a + 8b