If it's not what You are looking for type in the equation solver your own equation and let us solve it.
70x-x2=74.99
We move all terms to the left:
70x-x2-(74.99)=0
We add all the numbers together, and all the variables
-1x^2+70x-74.99=0
a = -1; b = 70; c = -74.99;
Δ = b2-4ac
Δ = 702-4·(-1)·(-74.99)
Δ = 4600.04
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(70)-\sqrt{4600.04}}{2*-1}=\frac{-70-\sqrt{4600.04}}{-2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(70)+\sqrt{4600.04}}{2*-1}=\frac{-70+\sqrt{4600.04}}{-2} $
| 2x(-13)-3(-7)=9 | | 20-8.1=d | | 8(y-2)+6=7y+2+y | | -z+14-13z=-14z+20 | | -13-16j=-16j-13 | | 13-4d=7-4d | | (x+3)(x+12)=12(x+18) | | 9-3n=3n-9 | | -p+20-2p=20+10p | | 6c-2=-7+6c | | 8+4v=4v+8 | | 4x+5/7=-7 | | 2j+1=9+2j | | 8-x/4=19 | | -10f-10=-10-10f | | 10+9r=-10+4r | | $60.1/4=x | | -7-2z=-6z-7 | | -6x=3=12 | | 7g+8=7g-10 | | 3y-25=y+8 | | 4-6v=22 | | (3x-1)^2-1=24 | | 18=k*17 | | y^2+2y-440=0 | | 8x=4x+13 | | 28=2k*14 | | 28=k*14 | | 23=x13 | | 5x+5(x+2)=40 | | 24-12x=120 | | (24-28x)/(12x^2)=1 |