0
Wiki User
19
Mina Hyatt ∙
3a+5b+7a=
-7a + 3a = -4a
7a + 4 = 5a + 7 7a = 5a + 3 2a = 3 a = 3/2
a + 3a - 2 + 3a. Add the a + 3a + 3a = 7a. You can't combine the -2 & 7a so the solution is: 7a - 2.
18
-7a-7b
15
7a+a=8a
The relevant expression is 7a.
7a
12a- 6a + a = 7a Since they all have the same variable, you can simply add and subtract 12-6 = 6 6+1 = 7
91
-2ab
(7a=3)=(-a-5)=16
It is: 2a+5a = 7a when simplified