Предмет: Математика, автор: oooo4139iiuyugrtg

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Ответы

Автор ответа: сок111213
1

2x - 4(5 - 6x) = 24 \\ 2x - 20 + 24x = 24 \\ 26x = 24 + 20 \\ 26x = 44 \\ x =  \frac{44}{26}  \\ x =  \frac{22}{13}  \\ x = 1 \frac{9}{13}

3x - 5 = 8x + 10 \\ 3x - 8x = 10 + 5 \\  - 5x = 15 \\ x =  \frac{15}{ - 5}  \\ x =  - 3

14(x - 2) = 0 \\ 14x - 28 = 0 \\ 14x =   28 \\ x = 28 \div 14 \\ x = 2

38 + 2(x - 3) = 14x \\ 38 + 2x - 6 = 14x \\ 2x - 14x =  - 32 \\  - 12x =  - 32 \\ x =  \frac{ - 32}{ - 12}   \\ x =  \frac{8}{3}  \\ x = 2 \frac{2}{3}

7 - 3(4 - 5x) = 8(x - 3) \\ 7 - 12 + 15x = 8x - 24 \\ 15x - 8x =  - 24 + 5 \\ 7x =  - 19 \\ x =  \frac{ - 19}{7}  \\ x =  - 2 \frac{5}{7}

Автор ответа: lizapanzova2005
0

Ответ:

1) 2x-4(5-6x) = 24

2x-20+24x = 24

26x = 44

x = 1 9/19

2) 3x-5 = 8x+10

-5x = 15

x = -3

3) 14(x-2) = 0

14x-28 = 0

14x = 28

x = 2

4) 38+2(x-3) = 14x

38+2x-6 = 14x

-12x = -32

x = 2 2/3

5) 7-3(4-5x) = 8(x-3)

7-12+15x = 8x-24

7x = -19

x = - 2 5/7


сок111213: в 1) 1 9/13, у Вас опечатка
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