If it's not what You are looking for type in the equation solver your own equation and let us solve it.
v in (-oo:+oo)
4.2*v = 7/15 // - 7/15
4.2*v-(7/15) = 0
4.2*v-7/15 = 0
4.2*v-7/15 = 0 // + 7/15
4.2*v = 7/15 // : 4.2
v = 7/15/4.2
v = 0.11111111
v = 0.11111111
| 16-40= | | 225x^2=16 | | 225x^2=16 | | 6x-3(10-3x)=7(3+8x) | | 6x-13=5x+16 | | -2x+20-4x=6x+2(3-7x) | | f(x)=x^2+6x+7 | | 7/2y+11/4=15/8 | | -96-8x=41-15x | | 8+7ln(x)=5 | | 81=4a^2 | | 2(3x-4)=3(4x+5) | | 2.8-x=4.5 | | -(x^2)-5x+12=0 | | 2y^2-y-9=0 | | K-8/5=17/5 | | 7x-3(2x-3)=4(2x+8) | | Y+8=-3(x-2) | | -12c=-50 | | n/3-1/3=5/3 | | 3x+4=-2x+5 | | 0.5x+4=5-2.5x | | 6t+4=-7 | | Y-5=3(x-4) | | 8x-3(x-1)=4(x+6) | | 2.4y=2.38+y+0.20 | | 81/2/2.125 | | 4x+27=49 | | 5x-1*3=48 | | 7(x-3)=4x-(3x+15) | | -3x+6-5(x-1)=-5x-2(2x-4)+5 | | 5y=4x+15 |