-2a - 4 = -16.8
-2a = -12.8
a = -12.8/-2
a = 6.4
4
2a 4 is the same as saying 2*a*4, so if you plug 2 in for a, this equals 16
-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
a = 1
2a -3 means 2 times a minus 3 if a = 2 we have 2 x 2 - 3 = 4 - 3 = 1
4
2a 4 is the same as saying 2*a*4, so if you plug 2 in for a, this equals 16
2a + 3a + 4 = 5a + 4
-2a + 5 = 1 -2a = -5 + 1 -2a = -4 a = -4/-2 a = 2
a = 3a + 4 0 = 2a + 4 2a = -4 a = -2
(5a+8) - (2a+4) =3a +4 To do this, simply subtract like terms. 5a-2a=3a and 8-4=4
2a+12=8 2a=-4 a=-2 So a is -2.
a = 1
7 times 4 times 6 equals 168
a = 4
a = 4