If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
300 = x/5+200 // - x/5+200
300-(x/5)-200 = 0
100-1/5*x = 0 // - 100
-1/5*x = -100 // : -1/5
x = -100/(-1/5)
x = 500
x = 500
| X+(x+2)+(x*4)=20 | | 3x-2(-1)=12 | | 5x^2-17x=12 | | x-.25x=78 | | 3(7j-7)=3(j-4) | | 8(w+2)=3(5w+10) | | 1-1/x-3=18/x^2-9 | | (21x-5y)-(15y+4x)= | | -4(3a+4)=20 | | 2x-x=7 | | -x^2-3x+7=0 | | 2.5m=15 | | 32x/8x | | 14-12/3+5 | | 9x+43=16 | | 10x-3=8x+17 | | 6(-5x+9)=-66 | | 4=24-4x | | 1/3x+2/x=8/x-1 | | -5x+2y=14 | | 7(4+3x)=49 | | 6x-14y=-28 | | 5x+8=3x^2 | | 2x^2-8x+10=5 | | 2x-5(x-5)=-8+5x-31 | | 3=13x-9x-8 | | -5x+-10=-54+6x | | -7n(n+3)-8(1+8n)= | | B/16=(b-6)/4 | | 1.15x+8-0.4x=-7 | | 2a^2+4a-6= | | 9x+18=5x+2 |