If it's not what You are looking for type in the equation solver your own equation and let us solve it.
29a=87=a
We move all terms to the left:
29a-(87)=0
We move all terms containing a to the left, all other terms to the right
29a=87
a=87/29
a=3
| 1.4x-4.12=2.5 | | -x+9+2x=2(2x-3) | | 9x+1=7x+35 | | X=25+6y | | 3x+2(-4x-4(=3 | | 6-(-5r=5r-3 | | 10+(5/2+x)=2 | | 3/5x+4=1/2x9 | | -24-3r=-9 | | -9-4q=-3q | | -7f-8-5f=-10f+4 | | -55=5y-5 | | 2x-6+2x-6+3x+15+3x+15=58 | | -8a-2=4 | | 14+3x-4=180 | | 21-5n=-4(2n-3) | | 2-5(5m-5=-73 | | -3z-225=-5(6z-3)+3 | | 13.9=r+4.6 | | -125-15x=103-3x | | -8v-2=-9v | | x/100=1/50 | | 3b-4=5b | | 5*2^(2x-3)=40 | | 6+x=-3x=8 | | 3x4=11 | | -9+8w=9w | | 6s-4s+4=16 | | -25=-3+4x | | 9x-1+16x+6=180 | | 3×+5x-2+4=18 | | 80=20-5x-16-5x |