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+87+88+90)/4 = 90 // - 90
(x+87+88+90)/4-90 = 0
(x+265)/4-90 = 0
(x+265)/4+(-90*4)/4 = 0
x-90*4+265 = 0
x-95 = 0
(x-95)/4 = 0
(x-95)/4 = 0 // * 4
x-95 = 0
x-95 = 0 // + 95
x = 95
x = 95
| 30+.23x=76 | | 6p+3-4(2p+5)= | | x^2+2cx-9c=0 | | -3(3M-6)+10(M-4)=14-6 | | .10x+.5(20-x)=.10(9) | | 209-62=x | | 209=x+(2x+23) | | 10-5x=-26+7x | | 2x+11=3x-5 | | 0.80x-3=5 | | 5/7(14x-21)+22=20((3/5)x-1)+9x | | -3x+7=5-(8x+6) | | 7Y-6(Y-1)+1=7 | | 2(4x-5)+x=40-x | | 56=6x+14+x | | 12(2x-7)=3(8x+4) | | 5/7(14x-21)+19=12((2/3)x-2)+15x | | 57-7x=20+24 | | -x^2+100x+1600=0 | | 6Y-5(Y-4)+5=5 | | 2.75x-3.13=5.12 | | 29n-4(3-4n)=39-(16-17n) | | 1x(3)=19+x | | x(3)=19+x | | 4x-5=14x-104 | | 6X-13=11+4X | | 21n-3(5-6n)=34-(19-15n) | | -40x^3+12x^2-9x=0 | | 10n-8n+2=11n-28+6 | | 8X+6-7X=1+7 | | 5n-5-n=9n+25 | | 3x+2(0)=4 |