6a + 9; a = 3
6a + 9
= 6(3) + 9
= 18 + 9
= 27
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Replace the value of a in the equation 6a+3 So 6x6+3=36+3=39.
13a - 6 + a = 5a + 3 + 3a 13a + a - 5a - 3a = 3 + 6 6a = 9 6a/6 = 9/6 a = 3/2
45
(4, 3)
a + 18 = 7a a-a +18 = 7a-a 18 = 6a 18/6 = 6a/6 3 = a 3=a