5a + 20 = ? Your question is incomplete.
5a+5=6a-7
5a = -5a + 5Add 5a to each side:10a = 5Divide each side by 10:a = 5/10 = 1/2
7a + 4 = 5a + 7 7a = 5a + 3 2a = 3 a = 3/2
3a4 - 2a2 + 5a - 10 - 2a4 + 4a2 + 5a - 2 = a4 + 2a2 + 10a - 12 = a4 + (2a - 2)(a + 6)
5a-20+2a = 6a-11 5a+2a-6a = 20-11 1a = 9 a = 9
a + 3a + 5a = 180 9a =180 a = 20
a + b + c = 180 b = 3a c = 5a Substituting the values of b and c into the first equation. a + 3a + 5a = 180 or 9a = 180 so that a = 20 then b = 3a = 3*20 = 60 and c = 5a = 5*20 = 100
5a-20 = -15
5a-20=
If: -5a = 300 Then: a = -60
so 5a = -20 making a = -4
a = 20 b = 60 c = 100
5a + 20 = ? Your question is incomplete.
5a+5=6a-7
(5a).7 = -23 7(5a) = -23 35a = -23 a = -23/35 a= -0.657 (3 d.p.)
Divide 5a and 180 by 5. a = 36