3/5x=1/2x+7

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Solution for 3/5x=1/2x+7 equation:



3/5x=1/2x+7
We move all terms to the left:
3/5x-(1/2x+7)=0
Domain of the equation: 5x!=0
x!=0/5
x!=0
x∈R
Domain of the equation: 2x+7)!=0
x∈R
We get rid of parentheses
3/5x-1/2x-7=0
We calculate fractions
6x/10x^2+(-5x)/10x^2-7=0
We multiply all the terms by the denominator
6x+(-5x)-7*10x^2=0
Wy multiply elements
-70x^2+6x+(-5x)=0
We get rid of parentheses
-70x^2+6x-5x=0
We add all the numbers together, and all the variables
-70x^2+x=0
a = -70; b = 1; c = 0;
Δ = b2-4ac
Δ = 12-4·(-70)·0
Δ = 1
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{1}=1$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(1)-1}{2*-70}=\frac{-2}{-140} =1/70 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+1}{2*-70}=\frac{0}{-140} =0 $

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