If it's not what You are looking for type in the equation solver your own equation and let us solve it.
2a+a+2a+a=12
We move all terms to the left:
2a+a+2a+a-(12)=0
We add all the numbers together, and all the variables
6a-12=0
We move all terms containing a to the left, all other terms to the right
6a=12
a=12/6
a=2
| 7h=-91 | | (5x+3)+87=180 | | 5p-2=9p+12 | | -4-7(7+4x)=16-5x | | 2b+9/5=−11/5 | | 4y/7-7/8=31/56 | | 16k-11k=20 | | 14x-7=3x-7 | | 7.5x-3600/x=210 | | 12q-8q=8 | | 3x-1`=2 | | 190=5(3v-7)=10v | | 2p+(p-3.40)•4=32.50 | | 9(z+1)-3(z-2)=2(z-2)+3(z-3) | | (n+6)/3=1.4 | | 2x10=3x-7 | | -2+2(3k+4)=2k-5(k+6) | | 2p+(p-3.50)•4=32.50 | | 4x/16=7x-20 | | -4(y-3)=2(2y-6) | | 6(-7g+3)=-(6+12g)-6 | | X+2x=285 | | 5(4x-9)-5=5(x-4)+45 | | 39-10w=-5(10w+5)+8w | | 14x=383/4 | | 3.6=10.5-3m | | 90+2x+x+13.5=180 | | 2(4z+1)-6=44 | | -41-12x=-5-4(6x-9) | | -11+x+1+2x=5x-4 | | 4x-6x+61=5x+40 | | 5(c-8)-2(2c+12)=-84 |