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)
(3/4)*y = 21 // - 21
(3/4)*y-21 = 0
3/4*y-21 = 0 // + 21
3/4*y = 21 // : 3/4
y = 21/3/4
y = 28
y = 28
| (2x+6)2= | | 3(z-3)=2y-9+y | | 3x-(2)=2 | | 24a-8-10a=-2(2-7a) | | 24a-8-10a=-2(2-7) | | 9(2m+50)=-14 | | 16=-b/4 | | (12x^2-8xy)-5(3xz-2yz)=0 | | 3y^2-10y+6= | | 3x^2+3x=8 | | 7x-10=y | | 12=2c | | 5x-4x=x-13 | | 3(3x-1)-4(2x-1)=(3x-1)(2x-1) | | (3t-3st)+(rs+r)=0 | | 9-b+8b=23 | | 13y=-16 | | -300=5x-x^2 | | (D-4)(d+10)=-17 | | 2x+4y=3 | | n/6=36 | | 4/a+3+2/3a | | y/4+2=0 | | K^2-8k-1=0 | | y/4+=0 | | 2x-1=2x+11 | | (s^2-2ps+2s)-(2s-4p+4)=0 | | 6y^3= | | 16=2(y-1)-6 | | -4[x-1]=3[2+x] | | -4x+6+5x=-20+24 | | x-3=4(3-x) |