If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-17a=-255
We move all terms to the left:
-17a-(-255)=0
We add all the numbers together, and all the variables
-17a+255=0
We move all terms containing a to the left, all other terms to the right
-17a=-255
a=-255/-17
a=+15
| 9x5=5 | | 0=-4n^2+204n | | 0=n/2{2×100+(n-1)-4} | | (x+1)(2x−6)=0 | | 0=n/2(2×100+(n-1)-4) | | 5x-2/3+1/2=4x | | 6(x+2)=-75 | | 2x+11=2(x−5) | | x2−11x+24=0 | | 12m-6+2m(8-5)-(3m-6)(7-2=0 | | 12m-6+2m(8-5)-3m-6(7-2)=0 | | 12m-6+2m(8-5)-3m-6(7-2=0 | | 4(p+3)+7=3p-1 | | 4x+24=x+4 | | 4x-24=x-4 | | 5x+8-3x=5-7x+3+9x | | (n-8)(n×3)=4 | | x^2/x^2+2-x^2-5/x^2-6=2 | | x+8=13;x=5 | | 9+6x/7=2 | | 4-x=1,5(2x-4 | | a/6+6=12 | | a÷6+6=12 | | 6x+46=x+16 | | -2(4+a)=6 | | -4(x-10)=20 | | 21=3x+7 | | 8x−6=50 | | 437=1+2*3/4*5*6*7/2+10x | | -3x-54=23+4x | | 50=5t+0.05t^2 | | 69+69+69+69+69+45x=990 |