If it's not what You are looking for type in the equation solver your own equation and let us solve it.
30+0.05n=40
We move all terms to the left:
30+0.05n-(40)=0
We add all the numbers together, and all the variables
0.05n-10=0
We move all terms containing n to the left, all other terms to the right
0.05n=10
n=10/0.05
n=200
| 10/20=x+2/x+6 | | 4y-y=2y | | 4x+3=2-6x | | 4.5+2.25x=100 | | 2(4x-11)=5x-7 | | 2r−7=r | | -6n−10=-n | | -9f=-10f−3 | | 9y=7+8y | | 65=x+10 | | -g=-3−2g | | -56y=8 | | -3b=8−2b | | 23=2x+1 | | 2^x-2=100 | | 4(2x-3)=0.2 | | 6v=7v−10 | | 5x-8/x^2=0 | | 6u=5u+10 | | 2^x-2=102 | | 3(5x+4)+3(2x+5)+2=21x+29 | | 21x+19=21x+29 | | 0.13x+19=0.17x+11 | | 4(-2+7v)=-28+8v | | 49-x=10 | | 6m-2=8 | | 0.13x+9=0.17x+11 | | 10m-6=15 | | 5=1/2x-1 | | x/7+8=14 | | 2x2=75 | | 7744=b1/8 |