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The fourth page of the sixth grade mathematics book of Jiangsu Education Press 9. 10. 1 1 standard! Complete!
9.( 1) Solution: Assume that the original planned investment is X million yuan. (2) Solution: Assume that the original planned investment is X million yuan.

10% x = 4.8 x- 10% x = 43.2

X=4.8 divided by 0. 1.9 x = 43.2.

x=48 x=48

A: The original planned investment was 480,000 yuan. A: The original planned investment was 480,000 yuan.

10 . x+3x of 4 = 35x+3x of 5 = 65438 of 7+00x-3x of 8 = 5 of 7。

1.75 x = 7 = 35 1.6x = 0.7 5 x of 8 = 5 of 7。

X = 20 x = 0.4375 x = 7 5 divided by 8 5.

x = 8/7

1 1.( 1)7 divided by 25%=28 (kg) A: This barrel of oil has 28 kg.

(2) 1-25%=75%

2 1 divided by 75% = 28kg) A: This barrel of oil contains 28kg.

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