If it's not what You are looking for type in the equation solver your own equation and let us solve it.
0.12x(2x-5)+3x=81
We move all terms to the left:
0.12x(2x-5)+3x-(81)=0
We add all the numbers together, and all the variables
3x+0.12x(2x-5)-81=0
We multiply parentheses
0x^2+3x+0x-81=0
We add all the numbers together, and all the variables
x^2+4x-81=0
a = 1; b = 4; c = -81;
Δ = b2-4ac
Δ = 42-4·1·(-81)
Δ = 340
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{340}=\sqrt{4*85}=\sqrt{4}*\sqrt{85}=2\sqrt{85}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(4)-2\sqrt{85}}{2*1}=\frac{-4-2\sqrt{85}}{2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(4)+2\sqrt{85}}{2*1}=\frac{-4+2\sqrt{85}}{2} $
| 3x-65=14 | | 3/x=x/48 | | 3x/2-4=1/3 | | 1070-x=x+50 | | 3(x-5)+5(x-3)=4(x-2)-3(x+1)-7 | | 24x-2x=12 | | (3x-7)=(5x+2) | | C+2+c-3=14 | | 4x+15=2x+2 | | 3(3-2x)+1=4x | | -25.5+-2.5y=0 | | 10x-16x=5 | | 10x+5=16x | | 0.75=m+0.5 | | x=28=96 | | 4(x-2)-1+2(2-3x)=5(x+2)-3(2x-5)+x | | 〖x(x〗^2-3x+2)=0.25 | | 3(4x+1)=3x-24x= | | H(x)=5x+(-9) | | 5(2x+7)=30 | | 4(a-4)=3(3a+5) | | A=150-2b | | –3(x+4)=18 | | 2x^2+8x-107=0 | | -x^2-8+33=0 | | 5+7(r+4)=89 | | 2y=5(7+y) | | 5t+2=2t+16 | | 7/12g=8 | | 8x-24=-x+12 | | 5x2=160 | | y+32=5 |