Решить уровнение 1) 1/2х +1/3х +1/4х=26/27 2) 2 1/3х-2 3/5=1 2/15 3) 4 5/12 - 5 3/5х =2 2/3 4) 5/18 х +2 1/2 = 10 5/6

1) 6/12х+4/12х+3/12х=26/27 13/12х=26/27 х=26/27÷13/12 х=26/27×12/13 х=8/9 ================ 2) 2 1/3х=1 2/15+2 3/5 7/3х=17/15+13/5 7/3х=17/15+39/15 7/3х=56/15 х=56/15÷7/3 х=56/15×3/7 х=8/5=1 3/5 ================ 3) 5 3/5х=4 5/12-2 2/3 28/5х=53/12-8/3 28/5х=53/12-32/12 28/5х=21/12 28/5х=7/4 х=7/4÷28/5 х=7/4×5/28 х=5/16 =============== 4) 5/18х=10 5/6-2 1/2 5/18х=65/6-5/2 5/18х=65/6-15/6 5/18х=50/6 5/18х=25/3 х=25/3÷5/18 х=25/3×18/5 х=30

1 км = 1000 м,

2 3/4 * 1000=11/4*1000=2750 м