If it's not what You are looking for type in the equation solver your own equation and let us solve it.
12a+8+3a=-7
We move all terms to the left:
12a+8+3a-(-7)=0
We add all the numbers together, and all the variables
15a+15=0
We move all terms containing a to the left, all other terms to the right
15a=-15
a=-15/15
a=-1
| 2x+3-8x=11 | | -x-20=2x+10 | | 15=-1/6x+9 | | 6(x-5)=6(x−5)=12 | | -1-10j=-9j-7 | | x+5+2x-4=12 | | 5x-6x+2=6 | | -5(2x+2)+3x=-3 | | 20-14=6r-9r | | -6p=-5p-9 | | 2x+8=−4 | | 50-x/2=30 | | 2x+11=5+x+6 | | -3(5-3x)+8=-8 | | –5+3u=4 | | 3x+10+9x+21=12x+11 | | |7x+1|=10 | | -1=p-10/4 | | 3x+0=9x-39 | | -8(6x+5)=-8 | | 24/(8-x)=5 | | x/7=3x3 | | w-28=6 | | -3w-4w=-5-44 | | 41=3x-1+14x+8 | | 7x+402x+23=180 | | b/10-4=-2 | | -30+h=-7 | | 8(-4x-8)=18 | | 4p+2+8=32 | | 8n=10+3n | | 5x-10+8x=20 |