If it's not what You are looking for type in the equation solver your own equation and let us solve it.
b in (-oo:+oo)
6*(2*b+7) = 90 // - 90
6*(2*b+7)-90 = 0
6*(2*b+7)-90 = 0
12*b-48 = 0
12*b-48 = 0
12*b-48 = 0 // + 48
12*b = 48 // : 12
b = 48/12
b = 4
b = 4
| 3(6b-10)=-138 | | 7(10+5a)=210 | | 7x+8x+3=4x+4 | | 4(6-4t)=40 | | 3(4w-5)=9 | | x/7+5x/7=12 | | 2(-6k+2)=112 | | 5(10+3x)=185 | | 2(-3t-4)=-50 | | 7(1-5t)=182 | | 5(-8-7a)=-145 | | 2(5n+1)=52 | | 15-y=42 | | X-25=18 | | 7(10+x)=21 | | 2(5+6x)=46 | | 7(-2-7n)=-259 | | 4(7+2a)=76 | | slopey=2x+8 | | -3(s+2)=-2(s+4)-5 | | 7(5-a)=-7 | | 86-8x=9x+16 | | x-70=25 | | 3(8+4b)=108 | | 5(-6a-10)=-260 | | 6(5t+5)=90 | | 6x+8x=0 | | -6(1-2v)=34+4v | | 3x^2-7=18 | | 7(6t+4)=-224 | | 4(6w+10)=184 | | 4(7+7k)=308 |