If it's not what You are looking for type in the equation solver your own equation and let us solve it.
49a=21
We move all terms to the left:
49a-(21)=0
We move all terms containing a to the left, all other terms to the right
49a=21
a=21/49
a=3/7
| 2^3x+1=5^x-3 | | 17=u/4-11 | | 2x−10=40 | | 5w-9=81 | | -16(x-3)=-4(4+4x) | | 3+7=2x | | n-8/1/8=11/6/7 | | 8x+4+10x-12+7x-2=180 | | -1/2(8a+16)=-2a+4 | | -7+2(-x-21)=30 | | 6(x-3)=-18+6x | | 8z+7-4z=-2z+1 | | -7+2(-x-21=30 | | 4(6x-3)+5x=5 | | 1c+5c+10c=$1.44 | | 8x-72=10x | | -15+3x=4(x-3) | | 2y+6=-4y-30 | | (2√3x^2)+3x=45 | | 5x+-2(2x+2)=-15 | | 6(x+4)=-3(-8-2x) | | 3x-36=27 | | 168=5x+6(-2x+14) | | −2x+4=6 | | 6+2(-8x-3)=6 | | 0=1/6k+8 | | 8x+-6=4x+38 | | 14-3x=-42+8x | | 0(t)=-16t^2+180 | | 9-2x=-2(x-1) | | 2(3a+2)=-4 | | 0(t)=-16t^2+150+30 |