9x + 9 - x = 47
8x + 9 = 47
8x = 38
x = 4,75
3x + 3 - x = 3 × 4,75 + 3 - 4,75 = 14,25 + 3 - 4,75 = 12,5.
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9x + 9 - x = 47
8x + 9 = 47
8x = 38
x = 4,75
3x + 3 - x = 3 × 4,75 + 3 - 4,75 = 14,25 + 3 - 4,75 = 12,5.