If it's not what You are looking for type in the equation solver your own equation and let us solve it.
3y-12=-21
We move all terms to the left:
3y-12-(-21)=0
We add all the numbers together, and all the variables
3y+9=0
We move all terms containing y to the left, all other terms to the right
3y=-9
y=-9/3
y=-3
| 2.5=14/x | | 12j+13=-15+8j | | 20-x=32 | | 7x+4=25;x=3 | | -9r-3=8 | | x+60+x76=180 | | 4g^2+36=0 | | -2/3x=42 | | x=(13X+3)*(6x-1) | | 1000=450x2.50-x | | -k+7=-1+7k | | 12+15b=14b | | x+96+68=180 | | 7(-2-5x)=119 | | 5/6x+7=-1 | | 5(2n-1)=15+16n | | x+37+x+69=180 | | 12a=35-2a=-a+2 | | 10t+8/6−4=2t+210t+86-4=2t+2 | | x-25=-2 | | (x+4)(x+4)=x(x+12) | | l+15.2=-15.2 | | 22+8-r=-7 | | /c–5=15 | | x+52+x+18=180 | | x+26+78=180 | | 7x^2+28x=-18 | | -9(f+54)=81 | | 0.8x=91x= | | –14=s2–16 | | 10x+2x+1=25 | | -5(x+-10)=-35 |