Решите 4,2*(0,25+x)=147(4,5-y)*5,8=8,7здесь 2 упражнения

4,2*(0,25+x)=147
1,05+4,2x=147
4,2x=147-1,05
4,2x=145,96

x= $\frac{145,96}{4,2} = 145 \frac{96}{100} : 4 \frac{2}{10} = 145 \frac{24}{25} : 4 \frac{1}{5} = \frac{3649}{25} : \frac{21}{5} = \frac{3649}{25} * \frac{5}{21} = \frac{3649}{5} * \frac{1}{21} =$ $\frac{3649}{105} = 34 \frac{79}{105}$

x= $34 \frac{79}{105}$

(4,5-y)*5,8=8,7
26,1-5,8y=8,7
-5,8y=8,7-26,1
-5,8y=-17,4

y= $\frac{-17,4}{-5,8} = 3$
y=3