1) упростите выражение  5,64х + 9,09х - 13,2х - 9,09.   16,95х + 2,24х - 1,02х - 16,95.

2) решите уравнение        (у+3,5) : 6 =1,3
                                        (18,4-х):12=0,18
3)корень уравнения 0,2х=1,26
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