Даю 35 балов, за подробное решение!
Розв’яжіть рівняння:

−0,72 : |x|= − 0,9.

−7х + 4х – 8х = −9,9;

0,6у – 1,9у – 0,5у = 0,54;

1/8x - 2/3x + 1/2x= - 5/18

-9 5/6b + 2 3/4b + 1 5/12b = 1 7/27
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