3x + 12 = 82 - 5x
5x + 3x = 82 -12
8x = 70
x = 70/8
x = 35/4
x = 8,75
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Verified answer
3x + 12 = 82 - 5x
5x + 3x = 82 -12
8x = 70
x = 70/8
x = 35/4
x = 8,75