13 minus quarter of a number is equal to 15 less - вопрос №131514397546 от dasha1933 27.12.2020 15:59

Question

Математика: 13 minus quarter of a number is equal to 15 less than the same number”​

dasha1933 · Answer

х - is a number.x/4 - is quarter of a number.x - (13 - x/4) = 15x - 13 + x/4 = 15x + x/4 = 15 + 134x/4 + x/4 = 285x/4 = 28x = 28•4/5x = 22,4Verification13 - 22,4/4 + 15 = 13 - 5,6 + 15 = 22,4...

13 minus quarter of a number is equal to 15 less than the same number”​

13 minus quarter of a number is equal to 15 less than the same number”