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# Answer on Algebra Question for SUNFLOWER

Question #3221

Sam went shopping at a department store. He spent 1/5 of his money on a sofa set and \$800 on a washing machine. Later, he spent 1/8 of his remaining amount on dining table. If the amount of money left was \$100 more than half of the amount he had at first, how much did Sam have at first?

Let's denote the whole amount of money as X.
Thus 1/5X was sent on a sofa set,
the remaining amount is X - 1/5X - \$800 = 4/5X - \$800
(4/5X - \$800)/8  was spent on dining table
4/5X - \$800 - (4/5X - \$800)/8 = 7/8* (4/5X - \$800)
If the amount of money left was \$100 more than half of the amount he had at first :
7/8* (4/5X - \$800) - \$100 = X/2, let's solve this equation for X.
7/10 X - \$700 - \$100 = 5X/10
2/10 X = \$800
X = \$4000
Answser: Sam had \$4000 at first.