If it's not what You are looking for type in the equation solver your own equation and let us solve it.
t in (-oo:+oo)
-t/3-12 = -13 // + 13
13-t/3-12 = 0
1-1/3*t = 0 // - 1
-1/3*t = -1 // : -1/3
t = -1/(-1/3)
t = 3
t = 3
| 5(x+1)-x=-15 | | 83=8y-5 | | 10+6q=-14 | | -4/x=-8/-4 | | 3x-5x+4x=7 | | -8x-7-8x=48 | | (25+43)2+7= | | 15/2÷25/8 | | 8-3(0)=35 | | t^2=20t+16 | | 21=7r-7 | | 8-3(-9)=35 | | 6(4x-3)=2(2x+1) | | 10x+3x=70+7 | | 8-3(6)=35 | | 6z+10=70 | | 50.98L=400000 | | 8-3(5)=35 | | 9y-8=4y-8 | | 14=3(-1)+5 | | 14=3(3)+5 | | -9x+48=-5x+8 | | 14=3(9)+5 | | 42.7144675L=500000 | | 14=3(-8)+5 | | 6y-5x-3=9 | | 4(3x+6)=5(2) | | r=c/2π | | -6a+19=-4a-1 | | 5(x+2)=5(-x-2) | | 4x+2x=18+6 | | 35x-5x-5000=6500 |