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)
(5*t)/7 = 15 // - 15
(5*t)/7-15 = 0
5/7*t-15 = 0 // + 15
5/7*t = 15 // : 5/7
t = 15/5/7
t = 21
t = 21
| -y^2=11 | | 7-5(8x+4)=-2 | | -26+3x=-52+9 | | 2/9s=8 | | 5x-20=12-3x | | 5b-2b-20=3b-10 | | 8+3x=5x+6 | | p(x)=x^2+1 | | mx+nz=p | | Y-9=-6(x-3) | | 5d-5=11 | | h(x)=x/2-1 | | (2x-4)(5x+9)=0 | | X/4=8.7 | | 58=27-g | | 6xy^5+3yx^4+9x^2=0 | | 20-65a-8= | | 4c-3(c-6)=2+2+2c | | F(x)=(x+I)(x-I) | | 20-1=x-3 | | 8(k-6)+58=2(2k+5) | | 11/8(4x−8)−2=11/16(8x−12) | | Z-350=371 | | b-/2=4 | | 5x+2(11-4x)=8(-2t+11) | | 45-x=3 | | 3=(-6/x) | | -2(-2y+1)=-2y+22 | | 0.7-b=1.9 | | R/15=30 | | -1-5/8-8 | | 5(2c-3)=2c+5 |