If it's not what You are looking for type in the equation solver your own equation and let us solve it.
(5+x)(8+x)=100
We move all terms to the left:
(5+x)(8+x)-(100)=0
We add all the numbers together, and all the variables
(x+5)(x+8)-100=0
We multiply parentheses ..
(+x^2+8x+5x+40)-100=0
We get rid of parentheses
x^2+8x+5x+40-100=0
We add all the numbers together, and all the variables
x^2+13x-60=0
a = 1; b = 13; c = -60;
Δ = b2-4ac
Δ = 132-4·1·(-60)
Δ = 409
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{-(13)-\sqrt{409}}{2*1}=\frac{-13-\sqrt{409}}{2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(13)+\sqrt{409}}{2*1}=\frac{-13+\sqrt{409}}{2} $
| 4x-(2+1x)=12 | | 0.06x+x=22.26 | | 10x(6x+80)=60 | | 3/3d-9=-1 | | x=6.75x+45 | | 9v+12=v+4 | | 20(4x)=32 | | 2(x+3)=2(x-1) | | |4v+16|=12 | | -r=3r-8 | | 4+21x=-2+22x | | 10−4k=–2k−8= | | 10−4k=–2k−8 | | 4(x-5)+8=40 | | 5.6x+7=2.6x+19 | | 5x-52+6x=14 | | 1+8m=9m+6 | | x-1/3=-2 | | 2x+-10=-5 | | -8n-2=3+10-3n | | 8.2(x+5)=15-0.8(x-10) | | 5x-12+9x=100 | | j/4+-9=-6 | | -4g-5=19 | | 7b^2-385=-42 | | 7y-4+2y+6=29 | | 10+0.5m=20 | | -27=9f | | 14+14e=28 | | 2(b-4)=4b+5 | | x-0.1x=585 | | d9=8 |