If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
x/4.9-(x/6.3) = 15 // - 15
x/4.9-(x/6.3)-15 = 0
x/4.9-0.15873016*x-15 = 0
0.04535147*x-15 = 0 // + 15
0.04535147*x = 15 // : 0.04535147
x = 15/0.04535147
x = 330.75002861
x = 330.75002861
| 4x-6=-9x | | 9y-15=6y | | 6x+7=10+2x | | 3ln(x)=8 | | 6c=7c+9 | | -4n+8=-12 | | 2/v=0.4/0.7 | | -3a+12+8a=7a-5a | | 6x+7=10-2x | | -7(3n+9)=12n | | 2x+4-19x-16= | | x-4=6.4 | | 36=2x+3y | | 0.5*10*x^2=3950 | | -4n-8=12 | | 1000x+(1-x)*6000=4000 | | 22t/11=2 | | -2u+16=-4(u-9) | | 2in=0.25 | | 72x+24=-6x | | 5x+13=-3-3x | | -420x-250(32x-57)-[-49x-21(17x+89)-430x]=425(84x-7) | | 41=7(z-3) | | 3x-14=11+8x | | .4-6=32 | | 18x^2+96=0 | | -5a+20+8a=2a-4a | | 2a=(3x-5y) | | 10+5-x-4x=5 | | 1.6/2.4=3.4/b | | -2xy(-3x+y)= | | 786+0.5*10*x^2=3950 |