Answer:
6a+b
Step-by-step explanation:
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5x + X/3 = 38.4
or, 5x* 3 + X = 38.4*3
or,. 15x + X. = 115.2
or,. 16 X. = 115.2
or,. X. = 115.2/16
X = 7.2
Answer: 19