If it's not what You are looking for type in the equation solver your own equation and let us solve it.
105+12m=309
We move all terms to the left:
105+12m-(309)=0
We add all the numbers together, and all the variables
12m-204=0
We move all terms containing m to the left, all other terms to the right
12m=204
m=204/12
m=17
| (81x+7)+63+(14x)=180 | | 105-12m=309 | | 14x(47-7)=82 | | 29n-150=285 | | (3x+5)^2+7=11 | | 19.89+0.6d-4.31=-d-12.9 | | |2-4w|=4w+5| | | x/7.1-6.5=1.2 | | (57x+1)+21x+(23)=180 | | 23n-8=176 | | 125m-75m+43425=45225-175m | | x-2.5=14.2 | | 17p-15=2p | | 7y-36=3(y-4) | | 9c=81c= | | 6z-20+50=360 | | 8x-2=3-2x | | 16x^-4-153^-2+81=0 | | (5x+7)+(8x)+(108)=180 | | 3x+3x=8-12 | | 196a^2-224a^2+128=0 | | (3x-2)(3x-2)=121 | | -x+1/2x=67/12+5/3-2 | | 6z-20=50 | | d+4/6=1 | | 6+2v=6 | | 7(v+3)=9v+7 | | x/8+6=11 | | 7a+13=10a–17 | | 35t-18=29t | | 5-(4x+5)=4-x | | 22-2m=6 |