If it's not what You are looking for type in the equation solver your own equation and let us solve it.
y in (-oo:+oo)
y/(-3) = -42 // + 42
y/(-3)+42 = 0
42-1/3*y = 0 // - 42
-1/3*y = -42 // : -1/3
y = -42/(-1/3)
y = 126
y = 126
| 3+5x=8+4 | | f(-2)=x^2+2x+5 | | K^2-4k+5=0 | | 4+2k+45=180 | | 4x^2+4y^2-4x+12y+9=0 | | 3x+6+2x+-5=2x-5 | | 1+6x+1+7x+1=16x | | X+12y=25 | | 8n+5n+16=4n+7n | | 3y-30+1=-18+16 | | -33-x=8x+3(-6x+4) | | 24=-1-5 | | 7x^2+5x-5=-5 | | 7+4r=7r-8 | | 5/12×6/15 | | 2x+11=2x-10+21 | | 3x/5-1=4x-1/2 | | 3y-10=25 | | 2c/7=3/4 | | N+[-8]=5 | | 0.8*x=40 | | 2/3•31/3 | | 3x-x=500 | | 20y^2+3y+10= | | a+25=41 | | -6(-6-8n)=36-5n | | (2x+3y)*2-(2x+3y)*2=360 | | 0=64-(x^2) | | 3H=3 | | 7/9-x/3=4/9 | | 0=64+x^2 | | (2x-1)=(x-5) |