1/3х+1/5х+1/6х=21/40 5 1/4х-2 2/3=1 5/12 8 4/15-5 2/5х=4 2/3 11/24х+7 1/3=9 5/8

Question

1/3х+1/5х+1/6х=21/40
5 1/4х-2 2/3=1 5/12
8 4/15-5 2/5х=4 2/3
11/24х+7 1/3=9 5/8

Answer 1

1/14x=21/40
x=7 7/20
5 1/4

Comments

а остальные???