Question

помогите пожалуйста ​

Answer 1

3 + a = 5/9

3 - 5/9 + a = 0

22/9 + a = 0

a = -22/9

x + 2+3/7 = 5+1/7

x + 2+3/7 - 5+1/7 = 0

x - 12/7 = 0

x = 12/7

Answer 2

$1.a = \frac{5}{9} - 3 = - \frac{22}{9} = - 2 \times \frac{4}{9}$

$2. x+2×3/7=5×1/7.. \: x + \frac{17}{7} = \frac{36}{7} . \\ x = \frac{36}{7} - \frac{17}{7} = \frac{19}{7} = 2 \times \frac{5}{7}$