=6a
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-2a + 5 = 1 -2a = -5 + 1 -2a = -4 a = -4/-2 a = 2
(5a+8) - (2a+4) =3a +4 To do this, simply subtract like terms. 5a-2a=3a and 8-4=4
-4 + 2A = 12 - 15A + A-4 + 2A = 12 - 16A2A = 12 - 16A + 42A = 16 - 16AA = 8 - 8A
a + a + a - 2a = 3a - 2a = a
a = 1