If it's not what You are looking for type in the equation solver your own equation and let us solve it.
f in (-oo:+oo)
f/2-18 = -10 // + 10
f/2-18+10 = 0
1/2*f-8 = 0 // + 8
1/2*f = 8 // : 1/2
f = 8/1/2
f = 16
f = 16
| F(x)=-5x^2-12+18 | | 4(h-2)=-32 | | 5f-.5=4f-.75 | | (4*2)-15+(10/2)+12-10 | | 12vx^3y^8+20v^7x^5=0 | | 6h-12-9h+8k+(-3k)= | | 2w+(-11)+18y+2w-11= | | 18+(-4x)+1-3x+8y= | | 90=15/2a | | =9x^2-9x+1 | | 16+w=24 | | =8x^2-8x+1 | | =6x^2-6x+1 | | 84a+105b=4998 | | 2c+3b+12+5r= | | =11x^2-11x+1 | | =13x^2-13x+1 | | =14x^2-14x+1 | | =12x^2-12x+1 | | 42+w=70 | | 42+w=20 | | =10x^2-10x+1 | | 2/3x+15=35 | | 84*3a+105b=4998 | | 84a+(105b)/3=4998 | | -2t-1/3=5 | | 2w^2-w=120 | | =18x^2-18x+1 | | 22x+33=44 | | -14q-21d=-42 | | 16x-8=56 | | 2x+1/6=3x+7/6 |