If it's not what You are looking for type in the equation solver your own equation and let us solve it.
a in (-oo:+oo)
a/172 = 25/100 // - 25/100
a/172-(25/100) = 0
a/172-1/4 = 0
1/172*a-1/4 = 0 // + 1/4
1/172*a = 1/4 // : 1/172
a = 1/4/1/172
a = 43
a = 43
| 7/10×4 | | tan(x/2)=2sinx | | 2x^2-4x=8x+16 | | 40=y-6 | | 2.95/6=x/50 | | 3m/2-5 | | (2/3)y-(1/5)=(-3/2) | | 2b(-6b-7)+2b^2= | | 4d+2(d+1)=14 | | 7/4-3/5c | | W(-4)=8 | | 2(4k+3)+4(k-2)=34 | | 2r^3-7r^2+r+8=0 | | -3x+15=24 | | 10x^3-24x^2+32x-3=0 | | ln(x+3)=ln(2x) | | 20x+10=21x+4 | | 10=u/v | | a/168=35/100 | | 5=5c | | 7x=4x+7 | | 5p^2-10=-5p | | 18a^2-22a+6=0 | | (x^(-3/8))^(-4/5) | | 80=x+110 | | 10e^3x-7=5 | | a/125=84/100 | | (5m)*(m-5)= | | (-14)(-2)+256=220 | | (-14)(-2)-256=220 | | 35x^2-44x-7=0 | | 36/24=120/x |