If it's not what You are looking for type in the equation solver your own equation and let us solve it.
15a+4a+a=20
We move all terms to the left:
15a+4a+a-(20)=0
We add all the numbers together, and all the variables
20a-20=0
We move all terms containing a to the left, all other terms to the right
20a=20
a=20/20
a=1
| 1/6+-n=-3/10 | | 3j+3j-3j=18 | | 1/2x4+2=9x-5x | | 4=-8+w | | 13r-9r+r-r+2r=18 | | 20h-2h+2h-11h=18 | | 9x*x+24x-1008=0 | | 96-w=213 | | 3x+72=6x-30 | | 4-8x+7=6 | | 5h-3h=14 | | 14-7z=-2z-3z | | 20=12k | | 17h-16h=5 | | 9q-6q=9 | | 10d-2d=8 | | 4x-2+7x-5=114 | | 71.1+x=180 | | 103+6x=247 | | b=+2/75/7 | | 22.7+x=34.6 | | -3/5b+7+2/5b=29 | | 7+8x-7=8 | | 12-r/6=5 | | 11+(-14/5)x=7 | | x=1/2=5 | | 7+8-7x=8 | | 4x+3=-2x—6 | | 22÷y=-2 | | 30=2.5n | | 77=-7+4(-7n-7) | | ((x^2)^2-9x^2+10x)/(x+2)=0 |