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Milutka
@Milutka
July 2022
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1 решите уравнения а) -(7-3y)=8-8*(2-y) б) -5(2-2х)=2(х-3)+4 в) 2х-4(х+7)=3(2-х) 2 решите уравнения а)1,26х+3,58=1,74х+6,46 б)0,88-(5,12+0,08y)=4,92y-y
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ника1981ооо
А)-(7-3y)=8-8*(2-y); -7+3y=8-16+8y; 3y-8y=8-16+7; -5y=-1; 5y=1; y=1/5=0,2. б)-5(2-2х)=2(х-3)+4; -10+10х=2х-6+4; 10х-2х=10-6+4; 8х=8; х=8/8; х=1; в)2х-4(х+7)=3(2-х); 2х-4х-28=6-3х; 2х-4х+3х=6+28; х=34; 2)1,26х+3,58=1,74х+6,46; 1,26х-1,74х=6,46-3,58; -0,48х=2,88; 0,48х=-2,88; х=-2,88/0,48; х=-6; б) 0,88-(5,12+0,08y)=4,92y-y 0,88-5,12-0,08y=4,92y-y; y-0,08y-4,92y=5,12-0,88; -4y=4,24; -y=4,24:4; -y=1,06;y=-1,06
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