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)
y = (15-(3*x))/4 // - (15-(3*x))/4
y-((15-(3*x))/4) = 0
y-((15-3*x)/4) = 0
(-1*(15-3*x))/4+y = 0
(-1*(15-3*x))/4+(4*y)/4 = 0
4*y-1*(15-3*x) = 0
3*x+4*y-15 = 0
(3*x+4*y-15)/4 = 0
(3*x+4*y-15)/4 = 0 // * 4
3*x+4*y-15 = 0
3*x+4*y-15 = 0 // - 4*y-15
3*x = -(4*y-15) // : 3
x = (-(4*y-15))/3
x = (15-(4*y))/3
x = (15-(4*y))/3
| (ln793-1)/-5 | | 16x-7+8=32 | | 17=4u-3 | | 4x+x+8=7x-16 | | x/7=2/7 | | x/1=7/11 | | w-s= | | 9=-45/x | | x/7=6/11 | | 5Xp= | | -28/x=-4 | | 11x-8+7x+7= | | 3x-7x+X= | | 5x+46=x+10 | | 15x=1/5 | | 5x=70+30+3y | | 8=8.4/x | | (-27/75)/2 | | x+26+3x-14=180 | | 7x+x+-210=150 | | -27X+18y=74 | | 1x+2Y+4z=2.20 | | x^5-6x+1=0 | | 1+2b=1 | | 1.5=0.5/x | | 8pi/12 | | X/2=1.6 | | -3y+9x=0 | | 7x=4x+15 | | 2x^2+7x+3=12.5(x+3)(x+0.5) | | ×/2=1.6 | | 25x+35=12x |