Решите уравнения. 1) 6x+ (3x – 4) = 14 4) 6y – 20 = 2(5y – 10) – 4 2) 8y – (5y – 24) = 51 5) 7(3 + x) = 2(x – 5) + 6 3) (6x + 1) – (3 – 2x) = 14 6) 15(x + 2) – 10 = 10x

Вопрос школьника по предмету Математика

Решите уравнения.
1) 6x+ (3x – 4) = 14 4) 6y – 20 = 2(5y – 10) – 4

2) 8y – (5y – 24) = 51 5) 7(3 + x) = 2(x – 5) + 6

3) (6x + 1) – (3 – 2x) = 14 6) 15(x + 2) – 10 = 10x

Ответ учителя по предмету Математика

1) 6x + (3x — 4) = 14

6x + 3x — 4 = 14

9x — 4 = 14

9x = 14 + 4

9x = 18

x = 2

2) 8y — (5y — 24) = 51

8y — 5y + 24 = 51

3y + 24 = 51

3y = 51 — 24

3y = 27

y = 9

3) (6x + 1) — (3 — 2x) = 14

6x + 1 — 3 + 2x = 14

8x — 2 = 14

8x = 14 + 2

8x = 16

x = 2

4) 6y — 20 = 2 (5y — 10) — 4

6y — 20 = 10y — 20 — 4

6y = 10y — 4

6y — 10y = — 4

— 4y = — 4

y = 1

5) 7 (3 + x) = 2 (x — 5) + 6

21 + 7x = 2x — 10 + 6

21 + 7x = 2x — 4

7x — 2x = — 4 — 21

5x = — 25

x = — 5

6) 15 (x + 2) — 10 = 10x

15x + 30 — 10 = 10x

15x + 20 = 10x

15x — 10x = — 20

5x = — 20

x = — 4