1.решить уравнение
(10х+5)-(9х+3)=3
0,9(х+2)=0.8(х+3)+6,4
2.
А)
(3х-y)(x+2y)
при х=2 y=9
Б)
5b-a
--------
3b
при а=14 b=4
3.
(4целых 5\6-1целая 7\18*2.4) разделить на 1.5
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