If it's not what You are looking for type in the equation solver your own equation and let us solve it.
3a+8a+a=180
We move all terms to the left:
3a+8a+a-(180)=0
We add all the numbers together, and all the variables
12a-180=0
We move all terms containing a to the left, all other terms to the right
12a=180
a=180/12
a=15
| 8•5.50+c=64 | | 15÷2-15÷2x=21÷4-6÷x | | 2x^2-9=17x | | 1=6-6×-3x | | -3x-3(-5x-17=3 | | 2.1x=54.4 | | 8(5.50+c)=64 | | 2x(4x^2)=0 | | x/4+10=36 | | |2x=1|=10 | | 6x+7x+8x=105 | | -14+3(x+10=7(2x+4) | | y-33/4=3 | | x^-4x+2=0 | | 2y+17=43 | | 0.4(x-6)=7.2 | | 77-31+40=x | | 1n+6=15 | | x^2-1.6x+0.36=0 | | 0=12-4m | | 18-8x+6x=5x+32 | | 8-9x-3=-31+7x-12 | | 21m-49=-91 | | 2/5 = j45 | | P=6000x1.05 | | (5x+11)+(3x+22)=(9x+28) | | -3x+30=10 | | -3-9=5x+2-4x | | -8+8(x-4)=-96 | | -8x-10=5x+16 | | 5/7=x+1/77 | | Y=300+20x.Y=200+25x |