3 + 9 = 12
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33x + 9 = 18 ----> 33x = 9 ----> x = 3/11
11a+9 = 4a+30 11a-4a = 30-9 7a = 21 Solution: a = 3
The solution is all points on the line y = x + 3, for example (0, 3) (1, 4), (2.567, 5.567).
9 + 9 + 9 + 9 + 9 + 9 + 6 + 6 + 6 + 6 + 2 + 2 + 23 + 3 + 3 + 4 + 4 + 4 = 123
y= -9