решите уравнение
1)9-7(х+3)=5-6х
2)(4х-15)(5х+35)(0,75-0,2х)=0
3)х+3/9+2х-1/6=х+1/2-х+7/18
1)9-7(х+3)=5-6х
2)(4х-15)(5х+35)(0,75-0,2х)=0
3)х+3/9+2х-1/6=х+1/2-х+7/18
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Answers & Comments
-7x+6x=5-9-21
-x=-25
x=25
2) (4*3.75)(5*(-7)+35)(0.75-0.2*3.75)=0
3x=8/9-1/2
3x= 16/18-9/18
3x= 7/18
x= 7/18*1/3
x=1/54