Question

Допоможіть будь ласка (тіки 2.)

Answer 1

7/10 + x = 9/10

x=9/10-7/10

x=2/10

7/10 + 2/10 = 9/10

2/10 = 2/10

52/63 - x/63 = 25/63

x = 52/63 - 25/63

x = 27/63

52/63 - 27/63 = 25/63

27/63 = 27/63

(x - 21/31) + 14/31 = 25/31

x - 21/31 = 25/31 - 14/31

x - 21/31 = 11/31

x = 11/31 + 21/31

x = 32/31

(32/31 - 21/31) + 14/31 = 25/31

1) 32/31 - 21/31 = 11/31

2) 11/31 + 14/31 = 25/31

32/31 = 32/31