If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
2*x+4*y = 3-(1/2) // - 3-(1/2)
2*x+4*y+1/2-3 = 0
2*x+4*y-5/2 = 0 // - 4*y-5/2
2*x = -(4*y-5/2) // : 2
x = (-(4*y-5/2))/2
x = (5/2-(4*y))/2
x = (5/2-(4*y))/2
| -9(2-10n)= | | 12+7t=-6t | | 2(4-x)-3(2x-4)=0 | | 3/7+N=4/3 | | 8y-9=9 | | x-(4(3.5)-7)=5(3.5)-(3.5+21) | | 4(7y)= | | 2x+3x-x=4 | | -81/2=-15r | | 15(3x+5)=120 | | y=10x+56 | | 8.2x-2.3=94.4 | | 7/9+x11/9 | | 29+8r=3(4r-1) | | 2x+4y=31/2 | | 6(2x-1)+1=12x-5 | | 25-b=37 | | 6x+7(x+3)=86 | | 37=10+x | | 14-(6-(3*r))=(4*r)-r | | 100-5n= | | -14+5t=3t | | 5/6y+1/5(y-6)=(y+1)/6 | | 3/7+N=11/3 | | 2(4x-2)=10x-12 | | 1/5*7/1 | | 10x+2=5x-9 | | 124=64/x | | 4*-0.5= | | x+4/30=13/15 | | 2/5x15/18 | | 6b+10-2b=-4b |