If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-1+a-15=4
We move all terms to the left:
-1+a-15-(4)=0
We add all the numbers together, and all the variables
a-20=0
We move all terms containing a to the left, all other terms to the right
a=20
| 5k+4+9k=74 | | 5x+6x+4x=180 | | 3v^2-2=0 | | F(x)=300(1.02)^5 | | 3v^2−2=0 | | 124=-16t2+124t | | F(c)=300(1.02)^3 | | 15+c/29=18 | | 124=-16t2+124t+5 | | -7x6=22 | | 5k+7+10k=127 | | -5=-8+u35 | | -4-7k=-81 | | 4x+4-2x=8 | | -2k+5k=2 | | v/2-12=15 | | -4=3x+4 | | 200+14x=424 | | 53=3+5k | | 20-(4)^.5x=50 | | 5=x=2 | | v2-9=0 | | 4.9x^2+18x-120=0 | | 17=y/5+16 | | 38 =n12 | | 12=-3(2x-16) | | x^2-14x=218 | | -2k+6=-8 | | 3(2x+3)/13=2x- | | -7k+2=-61 | | -52-3v=-16v+13 | | -52-3v=-16+13 |