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Оладушка666
@Оладушка666
August 2022
2
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Упрости выражение:
[tex]4 \times (3 - \frac{2}{5} x) - 2(0.6x + \frac{3}{4})[/tex]
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ssuper99999
0 votes
Thanks 1
Серенгети
4( 3 - 2/5х ) - 2( 0,6х + 3/4 ) = 10,5 - 2,8х.
2/5 = 2 × 2 / 5 × 2 = 4/10 = 0,4;
3/4 = 3 × 25 / 4 × 25 = 75/100 = 0,75.
Значит:
4( 3 - 0,4х ) - 2( 0,6х + 0,75 ) = 12 - 1,6х - 1,2х - 1,5 = 12 - 1,5 - 1,6х - 1,2х = 10,5 - 2,8х.
Ответ: 10,5 - 2,8х.
1 votes
Thanks 2
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Answers & Comments
2/5 = 2 × 2 / 5 × 2 = 4/10 = 0,4;
3/4 = 3 × 25 / 4 × 25 = 75/100 = 0,75.
Значит:
4( 3 - 0,4х ) - 2( 0,6х + 0,75 ) = 12 - 1,6х - 1,2х - 1,5 = 12 - 1,5 - 1,6х - 1,2х = 10,5 - 2,8х.
Ответ: 10,5 - 2,8х.