If it's not what You are looking for type in the equation solver your own equation and let us solve it.
48+90+a=180
We move all terms to the left:
48+90+a-(180)=0
We add all the numbers together, and all the variables
a-42=0
We move all terms containing a to the left, all other terms to the right
a=42
| 103=3+3(4v+3) | | 6x-2(x+5)=26 | | 11a-8a+6a+3=12 | | -2+5-p-8=p+3 | | -5(3+2r)+5=-90 | | -19+6s=5-2s | | 6b-4=-10 | | 5k^2+1=-63 | | 1=6-j | | (6x0.5-8)=0.5+10 | | 8.6x-6.3=28.1 | | 15x−6=12x−6 | | 2(-11+4x)=-30 | | -8.24=-x+.9 | | 4x+15.20=19.60 | | 2(-2+n)=-24 | | -2(-3-2)-5x+3=-2 | | 6=-4-r | | 3x+12(x=7) | | 5y−-9y=14 | | 4x+2=-8x+6 | | 3r=9+2r | | 5y−–9y=14 | | 6(x=2)=5(x=7) | | 7=9x(3=8) | | 26=-8/57y | | -12-5h=9h+12-17h | | 145=5+10p | | -12x+24=-14x+2 | | 2(x+5)+6x=8x=10 | | x=24/10x+7 | | 9x-1+80=180 |