If it's not what You are looking for type in the equation solver your own equation and let us solve it.
12(3=a)=48
We move all terms to the left:
12(3-(a))=0
We add all the numbers together, and all the variables
12(-1a+3)=0
We multiply parentheses
-12a+36=0
We move all terms containing a to the left, all other terms to the right
-12a=-36
a=-36/-12
a=+3
| 9r-12=-20+11r | | (4x-2)=(-5) | | 150-(75-8x)=139 | | -3x/5=-18 | | 4(x+7)-9(x-1)=484 | | 3(a-2)=a-8 | | 2x+7=-30 | | 2(12-2x)=x+3 | | 7=4w+2w+43 | | 2-2r=-2r+2 | | -7-5w=-4w | | 20y-5=21 | | 30n+15n=25n | | -6(2a+2)=-84 | | 24-4x=x+3 | | -3D+2+6d=4d-7 | | 7u+1=1+7u | | -248=-4(-8x+6) | | -7-10r=-10r-3 | | 11w=24+3w | | 3(2y-5=) | | 5x(20+3)=30 | | (92-7x)-13=9 | | 10u-7u=3u | | x-9+5=-1 | | X=115+3x+5 | | 5h=10+4h | | 5x(20+3)=x | | 12+2x-x=5x-8 | | 11x−(2−x)=51 | | 180=(x-4)+7x | | 2z-7-6=-7 |