Question

1) x+7/3=2x-3/5
2) 5/2x+3=2,5/4,5
3) 0,2/x+4=0,7/x-2
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Answer 1

Ответ:

1)

$x +\frac{7}{3} =2x-\frac{3}{5} \\\\x-2x=-\frac{3}{5}-\frac{7}{3}\\\\-x=-\frac{9}{15}-\frac{35}{15} \\\\-x=-\frac{44}{15} \\\\x=\frac{44}{15} \\\\x=2\frac{14}{15}$

2)

$\frac{5}{2} x+3=\frac{2,5}{4,5} \\\\\frac{5}{2}x=\frac{2,5}{4,5} -\frac{3}{1} \\\\\frac{5}{2}x= \frac{2,5}{4,5} -\frac{13,5}{4,5} \\\\\frac{5}{2}x=\frac{11}{4,5}\\\\x=\frac{11}{4,5} :\frac{5}{2} \\\\x=\frac{11}{4,5}*\frac{2}{5} \\\\x=\frac{22}{22,5}\\\\x= \frac{4,4}{4,5}$