If it's not what You are looking for type in the equation solver your own equation and let us solve it.
m in (-oo:+oo)
5*(6*m+4) = -250 // + 250
5*(6*m+4)+250 = 0
5*(6*m+4)+250 = 0
30*m+270 = 0
30*m+270 = 0
30*m+270 = 0 // - 270
30*m = -270 // : 30
m = -270/30
m = -9
m = -9
| 5(6-2b)=50 | | 4(-1+6a)=-52 | | 7(-1w+2)=-49 | | 4(7-4x)=-132 | | y=-5,(2,6) | | 4(8+6w)=-208 | | 7(3-7t)=364 | | 7(6a-6)=-252 | | 3(4b-4)=132 | | 6(8+4b)=48 | | 5a+6y-2a-4y= | | 3(6a+8)=-192 | | 5(-3a-2)=5 | | 4(1k+6)=8 | | 3(8+4k)=96 | | 5(-8+6x)=-100 | | 4(-4+7d)=208 | | 5(1b-1)=-45 | | 6(4m+10)=180 | | 5(3-6a)=-105 | | 6(3-4x)=-78 | | 2(4x+9)=-46 | | 6(2x+1)=78 | | 2(-5t+1)=-98 | | 3(2d+9)=51 | | 4(5+3m)=44 | | 2(-6+b)=0 | | 5(-4x+4)=140 | | 5(10-a)=105 | | 7(4+3d)=-98 | | 4(4-x)=8 | | x+1/4=3x-3/5 |