If it's not what You are looking for type in the equation solver your own equation and let us solve it.
y in (-oo:+oo)
(3/8)*y = 21 // - 21
(3/8)*y-21 = 0
3/8*y-21 = 0 // + 21
3/8*y = 21 // : 3/8
y = 21/3/8
y = 56
y = 56
| 6=a+4 | | -15+8y=-15 | | 5x/8y16y^2 | | 4y+5x=15 | | x+8+2x=44 | | .01(x+15)-.15=.01(6x+15) | | 2(2x-9)-7x=36 | | Z-0.5=6 | | 2x^2+5=10x | | 5x+2=3x-5 | | -13=j/5 | | 25+16x=82 | | 25w=4(22+3) | | 126=4x^2+5x+1 | | -7(5r+3)+9(10R+7)= | | 1x+1y=6.60 | | 36(11/16)+36(5/26)=c | | 4(1-x)=2(x-1) | | 3(m+7)=4m-1 | | 4y+9/3-7=-18 | | 8-3n=5*8 | | 2x/39/3=8-3x | | .3(3z+7)+1.9=.5(3z-4) | | 3xy+4x=12 | | 4r-9(1-6r)=-5r+6(10r-2) | | 4(1-6)=2(-6-1) | | y=x(3x-6) | | 8-5y+22=-5y-30 | | 4(1+x)=2(x-1) | | 10+7z=31 | | t^3-5t+2=0 | | 105=7x+7 |