You can put this solution on YOUR website! -3x^2+7x=0 is NOT an inequality but lets solve this equation.
Factor out x we get
x(-3x+7)=0 set x=0 and -3x+7=0 now we have x=0 and by subtracting 7 from both sides we have, -3x=-7 divide both sides by -3 we have; x=-7/-3=7/3
we have
x=0 and x=7/3