Question

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23 24 25

Answer 1

Ответ:

$23)\ \ \displaystyle \frac{2}{3}h+\frac{1}{2}h-\frac{3}{4}=2-\frac{1}{3}h+2\frac{1}{4}h\ |\cdot 12\\\\\\8h+6h-9=24-4h+27h\\\\14h-9=24+23h\\\\23h-14h=-9-24\\\\9h=-33\\\\h=-\frac{33}{9}=-3\frac{2}{3}$

$24)\ \ \displaystyle 1-1\frac{1}{2}x+3\frac{2}{5}x=1\frac{1}{3}x-2\frac{7}{15}x+2,5\\\\\\1-\frac{3}{2}x+\frac{17}{5}x=\frac{4}{3}x-\frac{37}{5}x+\frac{5}{2}\ \ \Big|\cdot 30\\\\\\30-45x+102x=40x-222x+75\\\\30+57x=-182x+75\\\\239x=45\\\\x=\frac{45}{239}$

$25)\ \ \displaystyle 2\cdot \Big(\frac{2}{5}z+1\Big)+3\frac{1}{3}=4-\frac{1}{2}\cdot \Big(\frac{4}{5}z-1\Big)\\\\\\2\cdot \frac{2z+5}{5}+\frac{10}{3}=4-\frac{1}{2}\cdot \frac{4z-5}{5}\ \ \Big|\cdot 30\\\\\\12\cdot (2z+5)+100=120-3\cdot (4z-5)\\\\24z+60+100=120-12z+15\\\\24z+160=135-12z\\\\36z=-25\\\\z=-\frac{25}{36}$