If it's not what You are looking for type in the equation solver your own equation and let us solve it.
7.6+a+3.4=12.5
We move all terms to the left:
7.6+a+3.4-(12.5)=0
We add all the numbers together, and all the variables
a-1.5=0
We move all terms containing a to the left, all other terms to the right
a=1.5
| 798=g+156 | | 22=h-65 | | m/29=15 | | v+17=99 | | v=17=99 | | j/10=0 | | v/7=31 | | (x–4)2=+8x–16 | | h+24=77 | | 24u=480 | | t-25=17 | | 788=s+77 | | 30=b/29 | | 175m-100m+48,250=50,500-175m | | r-3/4=2 | | h-580=405 | | 3.62-0.2=d | | 27z=675 | | j-8=10/11 | | c/23=7 | | m-4/9=4/9 | | n+364=878 | | y+7=6.1 | | 10d=390 | | u-11.09=5.91 | | t÷7=30 | | 1/2(16x-4)=2x-18 | | j-7/10=1/10 | | 423=27p | | 8/3x+1/3=6-2/3+7/3x | | 5m=860 | | 5x+20+4x=5+3x+5x+25 |