Question 1143371
Two equations, not of a system
Simple algebra to solve



{{{3x(2x-1)=0}}}

Either x is 0 or 2x-1 is 0;
Go on from there.



{{{2x^2+x=4}}}
How do you want?  Simple arithmetic knowledge or simple algebra?
{{{x(2x+1)=4}}}-----will this be enough?
or
{{{2x^2+x-4=0}}}

{{{x=(-1+- sqrt(1^2+4*2*4))/(4)}}}

{{{x=(-1+- sqrt(33))/4}}}