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^2 = 100/169 // - 100/169
T^2-(100/169) = 0
T^2-100/169 = 0
1*T^2 = 100/169 // : 1
T^2 = 100/169
T^2 = 100/169 // ^ 1/2
abs(T) = 10/13
T = 10/13 or T = -10/13
T in { 10/13, -10/13 }
| x/7-12=-2 | | -5(w-5)=-7w+9 | | 59.8=x/(0.2-x)^2 | | (x^2/x^2)^2 | | 5x-x=(2)33+30 | | x^2+66x-1=0 | | b/7-4=5 | | .4x-3=1.5(4x-3) | | 9+4/5=6 | | -8+4y=-36 | | x^2+5=-13 | | 7x-14=3x+6 | | 11-16z=75 | | 7n+3n=120 | | 3X+15=3Y-15 | | 11=15z+16 | | 2(x+7)-4=-20-4x | | v(8v-5)=0 | | 3y+15=3x-15 | | .429x-1=.667(6x-2) | | 5/6=9/2-2x/3 | | 0=w^2+8w-90 | | 2/5x+6=2/3x+10 | | 0=(4(x^2))-(16x)+(17) | | 4(2z-3)=7(z-4) | | 5(v+1)-v=-3(v-1)+7 | | 15y-9y=35 | | 8n=8(4n+9) | | 2x+12y=8 | | 50/x=25 | | (4x+4)=(3x+26) | | (3a-2)=(a+3) |