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5x - 3x ≤ 7+3
2x ≤ 10
x ≤ 10/2
x ≤ 5
jadi nilai x = 1,2,3,4,5 (C)
5x-3x = 7+3
2x <= 10
x <=
x <= 5
x={1,2,3,4,5}