Question

6×х=3,6;
8,4:х=4
х:2,5=1,6​

Answer 1

$\displaystyle 1)6x=3,6\\6x:6=3,6:6\\x=0,6\\\\2)8,4:x=4,x\neq 0\\\\\frac{42}{5}*\frac{1}{x}=4\\ \\\frac{42}{5x}=4\\ \\42=20x\\ 20x=42\\\\x=\frac{21}{10}=2\frac{1}{10}=2,1\\ \\3)x:2,5=1,6\\ \\x:\frac{5}{2}=1,6\\ \\x*\frac{2}{5}=1,6\\ \\\frac{2}{5}x=1,6\\ \\x=\frac{5}{2}*1,6\\ \\x=\frac{5}{2}*\frac{8}{5}\\ \\x=4$