Question

Х-4=16, 8+х=15, 40-х=30

Answer 1

1)

$x - 4 = 16\\x = 16 + 4\\x = 20$

Ответ: 20

2)

$8+x=15\\x = 15 - 8\\x=7$

Ответ: 7

3)

$40-x=30\\x = 40-30\\x = 10$

Ответ: 10

Answer 2

Х-4=16

Х=16+4

Х=20

8+Х=15

Х=15-8

Х=7

40-Х=30

Х=40-30

Х=10

УДАЧИ ВАМ!!!!☆☆☆☆☆

Answer 3

To solve for x in each of the given equations:

1. Х-4=16 Add 4 to both sides to isolate x: Х = 20

2. 8+х=15 Subtract 8 from both sides to isolate x: х = 7

3. 40-х=30 Subtract 30 from both sides to isolate x: -х = -10

Multiply both sides by -1 to isolate x: х = 10

Therefore, the solutions are: х = 20, 7, 10.