If it's not what You are looking for type in the equation solver your own equation and let us solve it.
a in (-oo:+oo)
7*a+3 = 59 // - 59
7*a-59+3 = 0
7*a-56 = 0 // + 56
7*a = 56 // : 7
a = 56/7
a = 8
a = 8
| 5m+4=39 | | -4+3m=26 | | 6-3b=-24 | | 7-5d=37 | | -1+6b=71 | | -4+4m=12 | | 7k+3=66 | | 10-6n=-26 | | 3+3w=9 | | -6+4d=26 | | -6t+6=-48 | | 1-7w=36 | | -6b-5=-65 | | 5+3d=35 | | -4b+7=-13 | | 6d+9=-39 | | -3+5m=-3 | | -4t+8=-8 | | 8-5w=-47 | | 10+3t=13 | | 7+4d=-13 | | 3w+4=40 | | -2-7d=-44 | | 5k-4=21 | | -5k+2=-8 | | 3+6b=-45 | | -4-6d=-76 | | 5d-5=50 | | 5t-2=43 | | -5b+2=-53 | | 10-2t=-4 | | -6d+9=45 |