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30x-12x^{2}-12=\left(3x-5\right)\left(10-4x\right)
Use the distributive property to multiply 2x-4 by 3-6x and combine like terms.
30x-12x^{2}-12=50x-12x^{2}-50
Use the distributive property to multiply 3x-5 by 10-4x and combine like terms.
30x-12x^{2}-12-50x=-12x^{2}-50
Subtract 50x from both sides.
-20x-12x^{2}-12=-12x^{2}-50
Combine 30x and -50x to get -20x.
-20x-12x^{2}-12+12x^{2}=-50
Add 12x^{2} to both sides.
-20x-12=-50
Combine -12x^{2} and 12x^{2} to get 0.
-20x=-50+12
Add 12 to both sides.
-20x=-38
Add -50 and 12 to get -38.
x=\frac{-38}{-20}
Divide both sides by -20.
x=\frac{19}{10}
Reduce the fraction \frac{-38}{-20} to lowest terms by extracting and canceling out -2.