If it's not what You are looking for type in the equation solver your own equation and let us solve it.
n in (-oo:+oo)
(n+6)/60 = 15/90 // - 15/90
(n+6)/60-(15/90) = 0
(n+6)/60-1/6 = 0
(6*(n+6))/(6*60)+(-1*60)/(6*60) = 0
6*(n+6)-1*60 = 0
6*n-24 = 0
(6*n-24)/(6*60) = 0
(6*n-24)/(6*60) = 0 // * 6*60
6*n-24 = 0
6*n-24 = 0 // + 24
6*n = 24 // : 6
n = 24/6
n = 4
n = 4
| 57=50+(n-40)/4 | | 2/3+34 | | 2/3+(-4/9)=m | | 4x^3-16x-1=0 | | 20x-8=40x+4 | | 5/13=(k-4)/39 | | 2/3x3/4 | | 4/x=10/15 | | K-19=-28 | | 26=-5(6k-9) | | 0.85= | | 56c^2-19c-15=0 | | 3(1-7n)=7(-3-3n) | | 12/3+3n=4/5n+18 | | 0.75(x+40)=0.35(x+20)+0.35(x+20) | | -4h+8+3=-21 | | X=5/6-1/2 | | 4/x=16/24 | | 7-(2n-2)=2-3n | | 4t*3t= | | x/3.1=4.9/4.4 | | 0.15p=p+180 | | -6(3c+4)=30-5c | | 2(8n-5)=102 | | 36=x^2+y^2 | | (6x-4)(7x-5)= | | 20x^2=-12x-1 | | 0.15p=p-150 | | 8(2-9p)-2=14 | | x^2-x+35=0 | | 8.25+12.38m=385.71 | | X/7=27/9 |