Jack spends 1 4/5 times as long on his homework as jill. Last week, jill spent 7 3/4 hours doing homework. How long did jack spe
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Answer: x=12
2x + 3 = x + 15
- 3 - 3
————————
2x = x +12
- x - x
—————
x = 12
2x + 3 = x + 15
- 3 - 3
————————
2x = x +12
- x - x
—————
x = 12