7A + 3
a + 18 = 7a a-a +18 = 7a-a 18 = 6a 18/6 = 6a/6 3 = a 3=a
7a-3
Collect like terms: 9a -7a = 9 - 15, ie 2a = -6, so a = -3
2a+5a=3 7a=3 a=3/7 or .4286
(7a=3)=(-a-5)=16
7a + 4 = 5a + 7 7a = 5a + 3 2a = 3 a = 3/2
7A + 3
a + 18 = 7a a-a +18 = 7a-a 18 = 6a 18/6 = 6a/6 3 = a 3=a
7a-3
7a
3a+5b+7a=
1029a3 + 375p3 = 3*(343a3 + 125p3) = 3*[(7a)3 + (5p)3] = 3(7a + 5p)*(49a2 - 70ap + 25p2)
-7a+2a+9 is also -5a+9. -5a+9=24. -5a=15. a=-3.
Collect like terms: 9a -7a = 9 - 15, ie 2a = -6, so a = -3
4a + 3a = (4 + 3)a = 7a
-7a + 3a = -4a