Question

Помогите пожалуйста, номер:3.4 и 3.5
Даю 20 балов

Answer 1

3.4

1)

$- 52 + x = - 42 \\ x = - 42 - ( - 52) \\ x = - 42 + 52 \\ x = 10$

2)

$y + 2.4 = - 5.8$

$y = - 5.8 - 2.4$

$y = - (5.8 + 2.4)$

$y = - 8.2$

3)

$x + ( - 7.25) = 12.45$

$x = 12.45 - ( - 7.25)$

$x = 12.45 + 7.25$

$x = 19.7$

4)

$y + ( - 6.11) = - 2.09$

$y = - 2.09 - ( - 6.11)$

$y = - 2.09 + 6.11$

$y = 4.02$

5)

$- 56.21 + x = 22.4$

$x = 22.4 - ( - 56.21)$

$x = 22.4 + 56.21$

$x = 78.61$

6)

$x + ( - 4.291) = - 4.291$

$x = - 4.291 - ( - 4.291)$

$x = - 4.291 + 4.291$

$x = 0$

3.5

1)

$x -18 = - 18$

$x = - 18 - ( - 18)$

$x = - 18 + 18$

$x = 0$

2)

$- 99 - y = - 100$

$- y = - 100 - ( - 99)$

$- y = - 100 + 99$

$- y = - 1$

$y = 1$