If it's not what You are looking for type in the equation solver your own equation and let us solve it.
3a=402
We move all terms to the left:
3a-(402)=0
We move all terms containing a to the left, all other terms to the right
3a=402
a=402/3
a=134
| x-(x*5/100)=71250 | | 21=-5+2m | | 11x=143.22 | | 8^2=8+3x(x+4) | | -16(d+1)=-1 | | 5p+20-10p=0 | | 3x+90=7x+54 | | 3x+90=7x+90 | | x/(0.1-2x)=32 | | 3x-15+15=100 | | 3x/x=27 | | 3x-2/6-2x+7=0 | | 7a/3=21=0 | | Y-3=-6(x-2 | | -6x+15=-13 | | 2d+6=9 | | 2h-11=7h-41 | | .2-5120/(x^2)=0 | | x+109=x+88 | | x+109=x+39 | | 12n2+21n=0 | | 0.05x+0.1(x+6)=1.65 | | 0.2x+54+0.2x+58=180 | | X^2+5x+8=17 | | 6.2=4u-19.4 | | 12+12+4x=360 | | 4x+6=6x+24 | | 1.5^y=2.25 | | -2-17+12-(-4)=x | | Y=5x+1300 | | 45()=9z() | | 4b-5=3+2b |