If it's not what You are looking for type in the equation solver your own equation and let us solve it.
c in (-oo:+oo)
(9/5)*c+54 = 81 // - 81
(9/5)*c-81+54 = 0
9/5*c-27 = 0 // + 27
9/5*c = 27 // : 9/5
c = 27/9/5
c = 15
c = 15
| M-7.2=-8.6 | | 3(v-1)-5=3a-2 | | 20+4a= | | 8(5n-1)-2n=30 | | 8+x=-9 | | .37x+3.67=20 | | 8(4k-1)=18-10 | | 8g=-4h-3x | | 47=-86+7 | | -w+4(w+3)=-24 | | M-7.2=8.6 | | 2x+3=.50(4x+6) | | x/5+5=3x-10 | | w-5*3= | | 5/4c-1/2=-3/4+5/8c | | -8.1-(5.25-6.6)= | | 19z+16-9z+4-2y= | | 1/12(48+24x)=-2(6-2) | | 8x+16=10x+50 | | 2h-3.24=1.1 | | x-3/4=-7 | | 6=-v | | y=-2x^2+4x+2 | | -(5.25-6.6)= | | 1a-3= | | 2(x-15)=-2(x+3) | | .20(10a)-15=3-2a | | 15x^2+80x+80= | | 1+8x=12(x+3) | | 3x-5(x-5)=-7+5x-24 | | a/3-4+9= | | 10/4t-3 |