Verified answer

Ответ:

Пошаговое объяснение:

1) 2x+1/6=3x-1/4

2x-3x=-1/4-1/6;

-x=-(3/12+2/12);

-x=-5/12;

x=5/12.

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2) x:2.5=8 4/7:2 1/7

x=2.5*8 4/7 : 2 1/7;

x= 25/10 * 60/7 : 15/7;

x=100/10;

x = 10.

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3)   10.5/x-3.6=51/x+1.8;

10.5/x-51/x = 1.8 + 3.6;

(10.5 - 51)/x = 5.4;

5.4x = -40.5;

x=-40.5/5.4;

x= -7.5.

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