Task/25565349
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см приложение
5) 2
6) 2
7)1800
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679*10⁻²/ 0,7+0,3=(679/ 0,7*10<span>²</span>+0,3=679/70 +3/10 =(679+21)/ 70 =10
4 4/7=32/7=64/14
-9/14х=64/14-2=64/14-28/14=36/14
х=36/14:(-9/14) =-36/14 * 14/9=-36/9=-4
(x-1 9/17)+2 14/17=5 5/17
x-1 9/17=5 5/17-2 14/17
x-1 9/17=42/17
x=42/17+26/17
x=68/17
x=4