Răspuns:
Explicație pas cu pas:
13)
a)
2/3 - x = 11/6
x = 2/3 - 11/6 = 4/6 - 11/6 = -7/6
b)
8/5 + x = 7/10
x = 7/10 - 8/5 = 7/10 - 16/10 = -9/10
c)
17/6 - x = 3/4
x = 17/6 - 3/4 = 34/12 - 9/12 = 25/12
d)
13/4 + x = 9/10
x = 9/10 - 13/4 = 18/20 - 65/20 = -47/20
e)
9/14 - x = 5/4
x = 9/14 - 5/4 = 18/28 - 35/28 = -17/28
f)
19/6 + x = 7/15
x = 7/15 - 19/6 = 14/30 - 95/30 = -81/30
