我唔知點做, 呢d係 equations in two unknowns既問題
1. the denominator of a fraction is 7 more than the numerator. if 5 is added to both the numerator and the denominator, the resulting fraction is 1/2. find the original fraction.
2. if the numerator and the denominator of a fraction are both decreased by 1, the resulting fraction is 1/2. 2/3 will be obtained if both the numerator and denominator are increased by 2, find the original number.
thz for helping =]1 個解答數學1 十年前
The front cover of a file is a rectangle. The ratio of the length to the width of the rectangle if 10 : 7. If the perimeter of the rectangle front cover is 119 cm, find the length and the width of the cover of the file.
可以的話, 可以寫成條式出黎嗎? thz so much,2 個解答數學1 十年前