Предмет: Математика, автор: georgmarkin2007

Кто поможет??????????

Приложения:

Ответы

Автор ответа: stwa
1

Ответ:

Пошаговое объяснение:

а) 28 + 10x = 8x + 6x

10x - 8x - 6x = -28

-4x = -28

x = 7

Ответ: 7.

б) 6a + 10 = 16a - 30

6a - 16a = -30 - 10

-10a = -40

a = 4

Ответ: 4.

в) 3/4y - 1/4y = 2y - 1/8

3/4y - 1/4y - 2y = -1/8

-1 1/2y = -1/8

y = 1/12

Ответ: 1/12.

г) 5(1 - 0,4a) = 4(1,5 + a)

5 - 2a = 6 + 4a

-2a - 4a = 6 - 5

-6a = 1

a = -1/6

Ответ: -1/6.

д) 5(x + 2,4) = 6,2x

5x + 12 = 6,2x

5x - 6,2x = -12

-1,2x = -12

x = 10

Ответ: 10.

е) 4(3 - 2x) + 24 = 2(3 + 2x)

12 - 8x + 24 = 6 + 4x

-8x - 4x = 6 - 12 - 24

-12x = -30

x = 2,5

Ответ: 2,5.

ж) 0,4(5y - 2) = 0,6(2y - 1) - 1,8

2y - 0,8 = 1,2y - 0,6 - 1,8

2y - 1,2y = -0,6 - 1,8 + 0,8

0,8x = -1,6

x = -2

Ответ: -2.

з) 8x + 24 = 6x + 16

8x - 6x = 16 - 24

2x = -8

x = -4

Ответ: -4.

и) 6x - 34 = 16x + 36

6x - 16x = 36 + 34

-10x = 70

x = -7

Ответ: -7.

к) 0,6(5x - 7) = 6(0,2x + 3,2)

3x - 4,2 = 1,2x + 19,2

3x - 1,2x = 19,2 + 4,2

1,8x = 23,4

x = 13

Ответ: 13.

p.s. - Желаю приятного дня =)


georgmarkin2007: Благодарю
stwa: Всегда пожалуйста =)
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