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)
(1/10)*(x-40) = 300 // - 300
(1/10)*(x-40)-300 = 0
1/10*(x-40)-300 = 0
1/10*(x-40)-300 = 0
1/10*x-304 = 0
1/10*x-304 = 0
1/10*x-304 = 0 // + 304
1/10*x = 304 // : 1/10
x = 304/1/10
x = 3040
x = 3040
| -2x^2-15x-19=-x^2-9x-11 | | 5(x+4)=100 | | -25(-9)=x | | X=1/16x | | -12(11)=x | | -8u+72=24 | | x^2+8=17 | | 15a^2-16a-3=0 | | 5(1)+14=3x-12 | | s=63/360(2)(3.14)(33) | | -47-18=x | | 5=in(1+x) | | x+x+(2x-7)=44 | | x+x(2x-7)=44 | | 12-3y=3 | | 11x-46=5x+98 | | 11-(-17)=x | | m/9+16=4 | | (1/2x)^2-3x=7x+8-10x | | -4-n=0 | | 0.8x-0.2y=1.5 | | 2x+120=14 | | .45x+.05(4-x)=.10(-70) | | 5x+47=2x+20 | | -x+45=3x+21 | | 4m+19=83 | | X/3-1=x/6+1 | | 0.1x+1.2y=0.8 | | x/5+6=x/5 | | 9/7=18/(2y-4) | | 9/7=18/2y-4 | | 1k/3+3=8 |