If it's not what You are looking for type in the equation solver your own equation and let us solve it.
5a-9=a=15
We move all terms to the left:
5a-9-(a)=0
We add all the numbers together, and all the variables
4a-9=0
We move all terms containing a to the left, all other terms to the right
4a=9
a=9/4
a=2+1/4
| 8y-36=20 | | 9=2.25p | | 7x+21=x×3 | | 2·3^x=40.8 | | x^2+9x-126=0 | | w=20*98+2 | | n=20*4-2 | | 3+18x;x=⅔ | | (x^2-x-6)=(x^2+5x) | | 4x+7x=10 | | -12r+7=(5-3r)-5 | | 4x-20;x=6 | | 8x-15=21+6x | | -12r+7=4(5-3r)-5 | | 4+57x–20=4(1/7x–1) | | 4+57x–20=4(17x–1) | | 6n-37=8-3n | | 2(3x+25)=80 | | 2x-1=7×+44 | | 20=5b-10 | | 5x-15;x=12 | | 13x+7=8×+27 | | -8x+8=-40 | | 19x2x=11 | | 2916=2x*0.5x | | 3t+25=-41 | | 5y+33=33 | | 0.2x+7=0.8x | | x+2x+60°=180° | | 13=0.5*n | | 33-7y=-18 | | 32=c(-8) |