Question

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ช่วยหน่อยคะ ด่วนค่ะ

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

103,800
90
cess
Total interest
from
one year
660
660
00
Ex = 66,000
00 = X
0 = X
nt to the firs
00 = 6,000
No.
4.
2.
3.
Problem
We divided 120,000 baht into 2
parts. The first part was taken to
use in trading investments so we
got 9 percent profit from this
investment and another part was
taken to buy the stocks so we got
8 per cent return. Finally, we got
10,320 baht from all investment.
How much is each investment?
Pawadee takes 18,000 baht to
deposit in 2 banks. So, the first
bank gives 6 per cent interest for
her and the second bank gives
8 per cent interest. After one year,
she'll get 1,240 baht from her
interest. How much money does
she deposit in each bank?
The man invests 12,000 baht to
deposit in the bank and for trading.
So, the investment profits are 7
per cent from interest of the bank
and 3 per cent from trading. How
much is each investment? Given
that his profits are 680 baht.
Dan 1
Plan and process
+18-X
8%
(xx) + ( 15.00-18
6%

Answer 1

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