Odpowiedź:
[tex]a)\\\\7x-5=4\\\\7x=4+5\\\\7x=9\ \ /:7\\\\x=\frac{9}{7}\\\\x=1\frac{2}{7}\\\\\\b)\\\\2a-0,2=11\\\\2a=11+0,2\\\\2a=11,2\ \ /:2\\\\a=5,6\\\\\\c)\\\\\frac{3}{5}+6x=7,6\\\\0,6+6x=7,6\\\\6x=7,6-0,6\\\\6x=7\ \ /:6\\\\x=\frac{7}{6}\\\\x=1\frac{1}{6}[/tex]
[tex]d)\\\\3m-4=18\\\\3m=18+4\\\\3m=22\ \ /:3\\\\m=\frac{22}{3}\\\\m=7\frac{1}{3}\\\\\\e)\\\\0,1x+7=11\\\\0,1x=11-7\\\\0,1x=4\ \ /:0,1\\\\x=40\\\\\\f)\\\\\frac{1}{3}y+4=9\ \ /\cdot3\\\\y+12=27\\\\y=27-12\\\\y=15[/tex]
