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Прошу!!
1)0.3(8-3y)=3.2-0.8(y-7)
2)[tex] \frac{5}{6}x+16= \frac{4}{9}x+9[/tex]
3)[tex] \frac{5}{6}( \frac{1}{3}x- \frac{1}{5})=3x+3 \frac{1}{3} [/tex]
Прошу!!
1)0.3(8-3y)=3.2-0.8(y-7)
2)[tex] \frac{5}{6}x+16= \frac{4}{9}x+9[/tex]
3)[tex] \frac{5}{6}( \frac{1}{3}x- \frac{1}{5})=3x+3 \frac{1}{3} [/tex]
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Verified answer
1)0.3(8-3y)=3.2-0.8(y-7)2,4-0,9у=3,2-0,8у+5,6
0,1у=-6,4
у=-6,4/0,1=-64
2)5/6 х +16=4/9 х+9
5/6 х-4/9 х=9-16
15/18х-8/18х=-7
7/18х=-7
х=-7:7/18=-7*18/7=-18
5/6(1/3х-1/5)=3х+3 1/3
5/18х-1/6=3х+10/3
3х-5/18х=-1/6-10/3
54/18х-5/18х=-1/6-20/6
49/18х=-21/6
х=-21/6:49/18=-21/6*18/49=-3/6*18/7=-1/2*18/7=-1/1*9/7=-9/7=-1 2/7