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5x-1x*3x=12
We move all terms to the left:
5x-1x*3x-(12)=0
Wy multiply elements
-3x^2+5x-12=0
a = -3; b = 5; c = -12;
Δ = b2-4ac
Δ = 52-4·(-3)·(-12)
Δ = -119
Delta is less than zero, so there is no solution for the equation
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