Question

Плиз,скиньте решения этих пропорций,заранее спасибо!

Answer 1

$1)\;1\frac34:\frac12x=2\frac58:1\frac12\\\frac12x\cdot2\frac58=1\frac34\cdot1\frac12\\\frac12x\cdot\frac{21}8=\frac74\cdot\frac32\\\frac{21}{16}x=\frac{21}{8}\\x=\frac{21}8:\frac{21}{16}=\frac{21}8\cdot\frac{16}{21}=2\\\\2)\;2\frac13:0,48=1\frac59:(x+0,08)\\2\frac13\cdot(x+0,08)=1\frac49\cdot0,48\\\frac73\cdot\left(x+\frac8{100}\right)=\frac{14}9\cdot\frac{48}{100}\\\frac73\cdot\left(x+\frac2{25}\right)=\frac{14}9\cdot\frac{12}{25}\\x+\frac2{25}=\frac{14}9\cdot\frac{12}{25}:\frac73$
$x+\frac2{25}=\frac{14}9\cdot\frac{12}{25}\cdot\frac37=\frac{8}{25}\\x=\frac{8}{25}-\frac2{25}=\frac{6}{25}$

$3.\;5,5:(3x)=11:21\\11\cdot3x=5,5\cdot21\\33x=115,5\\x=3,5$