Question

а) 1/6х+х=3
б)4:(20-х)=0,3

Answer 1

а) $frac{1}{6x} +x=3|*6x$

$1+6x^2=18x$

6x²-18x=-1
6x(x-3)=-1
6x=-1 or x-3=-1
x=-1/6    x=2

б)$frac{4}{20-x} =0.3|*20-x$

4=0.3(20-x)
4=6-0.3x
-0.3x=-2|*(-10)
3x=20
x=20/3