X=-1/6y+7

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Solution for X=-1/6y+7 equation:



X=-1/6X+7
We move all terms to the left:
X-(-1/6X+7)=0
Domain of the equation: 6X+7)!=0
X∈R
We get rid of parentheses
X+1/6X-7=0
We multiply all the terms by the denominator
X*6X-7*6X+1=0
Wy multiply elements
6X^2-42X+1=0
a = 6; b = -42; c = +1;
Δ = b2-4ac
Δ = -422-4·6·1
Δ = 1740
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:
$\sqrt{\Delta}=\sqrt{1740}=\sqrt{4*435}=\sqrt{4}*\sqrt{435}=2\sqrt{435}$
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-42)-2\sqrt{435}}{2*6}=\frac{42-2\sqrt{435}}{12} $
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-42)+2\sqrt{435}}{2*6}=\frac{42+2\sqrt{435}}{12} $

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