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)
2-((4/5)*y)+7 = -20 // + 20
2-((4/5)*y)+7+20 = 0
(-4/5)*y+2+7+20 = 0
29-4/5*y = 0 // - 29
-4/5*y = -29 // : -4/5
y = -29/(-4/5)
y = 145/4
y = 145/4
| 0=2x^2+2x-4 | | (9x)(6x)=y | | x+7/5=-3 | | x=10+y | | -4+6x=x+21 | | 2(7+3x)=-t | | x-6=x-10/3 | | 49c+1-4c=39c-2 | | (1/4)+(9/x)=5/8 | | 2+4(x-11)=22 | | 0.2x-0.5(2x+5)=-0.9(x+3) | | 117p^2+2pq-24q^2=0 | | 2x+2y=1000 | | n-12=6 | | 2/3x+1/6q+1/3 | | 1/4x+9x=5/8 | | -6-3(x-2)=7x+20 | | 10/3x-1/4=-81/4 | | m-55=67 | | 22.5=7(n-3.4) | | C=24/6 | | -7=-2x+11 | | x/8+1/2=9/8 | | 8-0.5x=1 | | -4(t-5)+6t=5t-6 | | 2b=b+27 | | (2c-4)=3(c-2) | | 20y+9=5y+9 | | -3-6k=-489 | | -[2z-(9z+10)]=10+(6z+6) | | k=4yz | | (3/y)+(11/y)=2 |