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92
No.
Show the methods to solve these problems.
1.
X
Problem
EXERCISE 7
So, he deposited 40,000 baht to the bank.
And bought stocks for 100,000 - 40,000 60,000 baht.
3
40,000
8.
X
+
6%
100
Plan and process
Supritsra got 10,000 baht from her
father on her birthday. Then, she
deposited her money at 2 banks.
She got six per cent interest from
the first bank and got seven percent
6
7
interest from the second bank. (xx100) + (10,000 - X):
How much money did she deposit
100
in each bank? (Given: Total earned
interest is 660 baht.)
6x + 70,000 - 7x 66,000
70,000 - 66,000 = x
4,000 = x
So, she deposited 4,000 baht to the first
bank and 10,000 - 4,000 = 6,000
to the second bank.
10,000 - X
7%
Total interest
from
one year
660
= 660
got 9 percent profit from the
investment and another part w
taken to buy the stocks so ws
8 per cent return. Finally, we
10,320 baht from all investm
How much is each investme
3.
Pawadee takes 18,000
deposit in 2 banks. So,
bank gives 6 per cent int
her and the second ba
8 per cent interest. After
she'll get 1,240 baht.
interest. How much r
she deposit in each ba
4.
The man invests
deposit in the bank
So, the investmen
per cent from inte
and 3 per cent fr
much is each in
that his profits
