4,3(57)=4,3575757...
4,(357)=4,357357357...
<u>4,35739</u>
<u>4,35751</u>
<u>4,3574</u>
12/х = -12/5 - 25/5
12/х = -37/5
Х= - (12×5)/37
Х=-60/37