Math Problem please help!
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Math Problem please help!

[From: ] [author: ] [Date: 13-03-06] [Hit: ]
80x.The total amount is (10000 + 0.(10000 + 0.80x)0.700 + 0.0.......
A salesman salary is P10,000 plus 80% of a special fund amounting to x. 7% of the total amount he receives is P868. Find the value of x. The answer is P3,000. How is it derived? Thanks! PLease show the solution :)

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"80% of a special fund is x" means 0.80x.

The total amount is (10000 + 0.80x)

"7% of the total amount he receives is P868" means
(10000 + 0.80x)0.07 = 868
700 + 0.056x = 868
0.056x = 168
x = 3000
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