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)
(1/2)*(x+450) = 300 // - 300
(1/2)*(x+450)-300 = 0
1/2*(x+450)-300 = 0
1/2*(x+450)-300 = 0
1/2*x-75 = 0
1/2*x-75 = 0
1/2*x-75 = 0 // + 75
1/2*x = 75 // : 1/2
x = 75/1/2
x = 150
x = 150
| -(x+12)=-12(1-8x) | | 7x-5+25=90 | | x-3/4=0 | | A+a-s-s=h(7-8) | | 1.3x+2.4y=-39.9 | | -2x^2+400x-110=0 | | -15+x=2(5x-5)-8x | | 12a^2+4ab-5b^2=0 | | (x)(-8x+4)=0 | | 2x+8x=90 | | 120-173/8 | | -6x=-2x | | -4x+6x= | | (2x^2-4x+3)+(-x^2+6x-8)= | | 11/17=y/8 | | -4+y=-4y+6 | | (-3)(-x+8)=0 | | 3x-3/4-x=18 | | 1x-5=1x+6 | | 11111111111111-222222222222222+2222112x=1-1-1-1-1-1-x-23456789x | | 3(-8+4v)=8 | | 9+3m=-2 | | 9p+-4p+6=7p+6-3p | | 5+1x=6+1x | | 1+4(3b-9)-b= | | 4/x+4x/x+2=4 | | 2x^2-11x+9y+21=180 | | V^2=29 | | (-4x^2-3)(-2x-1)=0 | | 6x-12+8=5x-11+6-2 | | 6x-12+8=5x-11+6-2 | | 40x^2-3x-1= |