3,2*(5x-1)=3,6x-9, 5/7 * (12, 6 - 2, 8x) = 3,6×(5/9 - 3/4 * x) (36/5 * x + 45/4) * 3/14 = 2/3 * x + - id2082696820221122 от vitalinaartikov 22.11.2022 11:34

Question

Математика: 3,2*(5x-1)=3,6x-9, 5/7 * (12, 6 - 2, 8x) = 3,6×(5/9 - 3/4 * x) (36/5 * x + 45/4) * 3/14 = 2/3 * x + 5 2/3 7(0, 7x + 0, 9) = 5, 05x + 13, 8 (x - 4)/3 = (x - 3)/2 - (11x + 43)/6 1/2 * (8x - 4) - 5 = 6(1/3 * x + 1/2) 5 - (1 1/2 + 1/3) * 6 = 2 1/3 * x - 5 1/2

vitalinaartikov · Accepted Answer

Х1 + х2 + х3 = 80,
2*(х1 - 8) = х3,
2*(х2 - 12) = х3;

х1 = 80 - х2 - х3,
2*(х1 - 8) = х3,
2*(х2 - 12) = х3;

х1 = 80 - х2 - х3,
2*(80 - х2 - х3 - 8) = х3,
2*(х2 - 12) = х3;

х1 = 80 - х2 - х3,
144 - 2х2 - 2х3 = х3,
2*(х2 - 12) = х3;

х1 = 80 - х2 - х3,
х2 = (144 - 3х3)/2,
2*(х2 - 12) = х3;

х1 = 80 - х2 - х3,
х2 = (144 - 3х3)/2,
2*((144 - 3х3)/2 - 24/2) = х3;

х1 = 80 - х2 - х3,
х2 = (144 - 3х3)/2,
х3 = 2*(120 - 3х3)/2;

х1 = 80 - х2 - х3,
х2 = (144 - 3х3)/2,
х3 = 30;

х1 = 80 - х2 - х3,
х2 = (144 - 3*30)/2,
х3 = 30;

х1 = 80 - х2 - х3,
х2 = 27,
х3 = 30;

х1 = 23,
х2 = 27,
х3 = 30.

3,2(5x-1)=3,6x-9, 5/7 (12, 6 - 2, 8x) = 3,6×(5/9 - 3/4 * x)

(36/5 * x + 45/4) * 3/14 = 2/3 * x + 5 2/3

7(0, 7x + 0, 9) = 5, 05x + 13, 8

(x - 4)/3 = (x - 3)/2 - (11x + 43)/6 1/2 * (8x - 4)

- 5 = 6(1/3 * x + 1/2)

5 - (1 1/2 + 1/3) * 6 = 2 1/3 * x - 5 1/2

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