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)
(1/5)*(x+750) = 300 // - 300
(1/5)*(x+750)-300 = 0
1/5*(x+750)-300 = 0
1/5*(x+750)-300 = 0
1/5*x-150 = 0
1/5*x-150 = 0
1/5*x-150 = 0 // + 150
1/5*x = 150 // : 1/5
x = 150/1/5
x = 750
x = 750
| 2x(x+1)=15 | | -36=30-6x | | 3(5x-8)=6 | | 1/5(750+x)=290 | | 5k-k+4k-2k-2k=12 | | 15-x/6=14 | | 7(2-x)=-7 | | 7x+5y(x+1)=55 | | 7-8a=2(5-4a)-3 | | (m+1)x^2+2mx+m+3=0 | | 10+5x=-x+28 | | -2=x/5-3 | | y=-2.21+56 | | 3x+x=420 | | X/3-4=-3 | | -20q+6q+q+8q+14q=9 | | 6x-5=-5+5x | | x(x-4)=-12 | | 3(5x+1)=18 | | -4x^3-11x^2-6x=0 | | -2(3n-4)=10-6n | | 20q+6q+q+8q+14q=9 | | 8s-(8+6)=20 | | -2(3n-4)=10-6m | | 6x-5=-5x+6 | | 3(8m+25)=9m | | 340/4 | | m^2-29m+100=0 | | x^1/3=125 | | 9+x+x=-11 | | 4c+5c-8c=5 | | m^2-29+100=0 |