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-5(1/5x-22)=8(1/2x-15)
We move all terms to the left:
-5(1/5x-22)-(8(1/2x-15))=0
Domain of the equation: 5x-22)!=0
x∈R
Domain of the equation: 2x-15))!=0We multiply parentheses
x∈R
-5x-(8(1/2x-15))+110=0
We multiply all the terms by the denominator
-5x*2x+110*2x-15))-(8(1-15))=0
We add all the numbers together, and all the variables
-5x*2x+110*2x-15))-(8(-14))=0
We add all the numbers together, and all the variables
-5x*2x+110*2x=0
Wy multiply elements
-10x^2+220x=0
a = -10; b = 220; c = 0;
Δ = b2-4ac
Δ = 2202-4·(-10)·0
Δ = 48400
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{48400}=220$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(220)-220}{2*-10}=\frac{-440}{-20} =+22 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(220)+220}{2*-10}=\frac{0}{-20} =0 $
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