15a - 25b + 20 = 5 (3a - 5b + 4)
5(3a - 5b + 4)
Factor completely and check mentally 10a^2+20a
5b + 5b = 2 x 5b
What is the solution of -2a plus 3a plus 5b
3a+5b+7a=
3a + (3b - 2a) + 5b =3a + 3b - 2a + 5b =(3a - 2a) + (3b + 5b) =a + 8b
2a+5b isn't possible the answer is still 2a+5b.
7b + 16 = 5b + 247b - 5b = 24 - 162b = 8b = 4
The expression is 5b + 16
-b+5b-2b=2b
5b plus 5-3b-7 is 2b-2.