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7x+21/7=(2x-6)/2
We move all terms to the left:
7x+21/7-((2x-6)/2)=0
We add all the numbers together, and all the variables
7x-((2x-6)/2)+3=0
We multiply all the terms by the denominator
7x*2)-((2x-6)+3*2)=0
We add all the numbers together, and all the variables
7x*2)-((2x-6)=0
Wy multiply elements
14x^2=0
a = 14; b = 0; c = 0;
Δ = b2-4ac
Δ = 02-4·14·0
Δ = 0
Delta is equal to zero, so there is only one solution to the equation
Stosujemy wzór:$x=\frac{-b}{2a}=\frac{0}{28}=0$
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